RCUS


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:GeneralAndAdministrativeExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ResearchAndDevelopmentExpense
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
us-gaap:TypeOfArrangement

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService

us-gaap:Revenues
us-gaap:CounterpartyName, us-gaap:ProductOrService

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue
us-gaap:StatementGeographical

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:SubsequentEventType

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:CounterpartyName, us-gaap:StatementEquityComponents, us-gaap:TypeOfArrangement
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:ProceedsFromSaleOfShortTermInvestments

rcus:AccessRightsRelatedToCompanySResearchAndDevelopmentPipeline

rcus:AllocationOfTransactionPrice

rcus:AllocationToPerformanceObligations

rcus:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities
us-gaap:CounterpartyName
rcus:ClinicalAndRegulatoryMilestonesAchievedUnderLicenseAgreement
us-gaap:CounterpartyName
rcus:ClinicalRegulatoryAndCommercializationRemainingMilestonePayments
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ConsultantAndLegalFees
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ContractWithCustomerInitialTransactionPrice
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ContractualObligationForFirstPayment
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ContractualObligationRemainingAmountNotObligatedToPay

rcus:DeferredRevenueFromRelatedParty

rcus:DevelopmentAndCommercializationServicesForZimberelimab
us-gaap:TypeOfArrangement
rcus:DirectOfferingCost

rcus:DomvanalimabOption
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:DomvanalimabOptionPaymentUponAchievementOfCertainDevelopmentMilestones

rcus:EtrumadenantOption
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:FairValueOfStockPurchased
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:FundsReceivedForStockPurchaseAgreement

rcus:IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses

rcus:IncreaseDecreaseInDeferredRent

rcus:IncreaseDecreaseInOperatingLeaseLiabilities

rcus:InterestAndOtherIncomeExpenseNonoperatingNet
us-gaap:CounterpartyName
rcus:MilestoneExpense
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
rcus:MilestonePayments
us-gaap:CounterpartyName
rcus:NetExpensesOfInception
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:NonRefundableAndNonCreditableUpfrontCashPayments
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:OptionFeePerProgramForAllOtherProgramsEnteringClinicalDevelopmentToExerciseOption
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
rcus:OptionFeePerProgramForCurrentClinicalProgramsToExerciseOption
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:OptionPaymentUponAchievementOfCertainDevelopmentMilestones

rcus:PaymentForAccessRightsRelatedToTheCompanySResearch
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:PercentageOfOptionToPurchaseMaximumSharesOfCommonStock
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:PercentageOfPremiumPurchasePriceOfCommonStock

rcus:PremiumFromStockPurchaseAgreement
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:PremiumPaidOnStockPurchaseAgreement

rcus:ProceedsFromIssuanceOfCommonStockToRelatedParty

rcus:ProceedsFromSaleOfShortTermAndLongTermInvestments

rcus:ReceivableFromRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement
rcus:ReimbursementOfMilestoneExpenseOfCostSharingProvisions
us-gaap:TypeOfArrangement
rcus:ReimbursementOfResearchAndDevelopmentExpenseExcludingAcquiredInProcessCosts
us-gaap:IncomeStatementLocation
rcus:RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts
us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:RepurchaseOfUnvestedSharesOfStock
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:StockIssuedDuringPeriodValueDeterminedToPremiumOnPurchaseOfCommonStockAndAllocatedToPerformanceObligation

rcus:StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock
us-gaap:StatementEquityComponents

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption
us-gaap:StatementEquityComponents

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock
us-gaap:StatementEquityComponents
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation
rcus:SubLicenseFeesIncurred
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
rcus:UnrealizedGainLossOnEquityMethodInvestments
us-gaap:CounterpartyName
rcus:UpfrontAndMilestonePayments
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation

rcus:UpfrontCashPayment
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation
us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:VestingOfEarlyExercisedStockOptions

rcus:VestingOfEarlyExercisedStockOptionsAndRestrictedStock

rcus:ZimberelimabLicense

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:AdjustmentForAmortization
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts

us-gaap:CapitalExpendituresIncurredButNotYetPaid
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement
us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:DeferredRevenueRevenueRecognized1

us-gaap:DepreciationAndAmortization

us-gaap:GainLossOnSaleOfEquityInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeLossFromContinuingOperationsPerBasicAndDilutedShare

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:CounterpartyName, us-gaap:SubsequentEventType
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
us-gaap:StatementGeographical, us-gaap:SubsequentEventType
us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

us-gaap:RevenueFromRelatedParties

us-gaap:ShortTermLeaseCost
us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

rcus:AccruedResearchAndDevelopmentExpensesCurrent

rcus:CashCashEquivalentsAndAvailableForSaleInvestments
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ContingentMilestonePaymentsReceivable
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ContractualObligationAdditionalPaymentDue

rcus:DeferredRevenueRelatedPartiesClassifiedCurrent

rcus:DeferredRevenueRelatedPartiesNoncurrent
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:DeferredRevenueRelatedToResearchAndDevelopmentPipeline

rcus:DeferredTaxAssetsLeaseLiability

rcus:DeferredTaxAssetsLeasingArrangements

rcus:DeferredTaxLiabilitiesRightOfUseAssets
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:FutureDevelopmentAndPromotionCostsContractLiability
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
rcus:FutureDevelopmentAndPromotionCostsContractLiabilityCurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
rcus:FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

rcus:LesseeOperatingLeaseAllowanceForTenantImprovements
us-gaap:StatementGeographical, us-gaap:SubsequentEventType
us-gaap:StatementGeographical, us-gaap:SubsequentEventType
rcus:LesseeOperatingLeaseCollateralAmount

rcus:LesseeOperatingLeaseLiabilityPaymentsDueThereafter

rcus:LesseeOperatingLeaseLiabilityPaymentsDueYearSix

rcus:LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements
us-gaap:StatementGeographical, us-gaap:SubsequentEventType

rcus:LesseeOperatingLeaseTenantImprovementAllowanceReceivable

rcus:OperatingLeaseLiabilityNetOfTenantImprovementAllowancesReceivable
us-gaap:IncomeTaxAuthority
rcus:OperatingLossCarryForwardsWithNoExpirationDate

rcus:OtherAccruedLiabilities
us-gaap:RelatedPartyTransactionsByRelatedParty
rcus:PercentageOfOutstandingCommonStockOwned
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:PresentValueOfResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo

rcus:RelatedPartiesContractLiabilitiesNoncurrent
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
rcus:ResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo

rcus:TenantImprovementAllowanceExpectedToBeReceivedInLessThanOneYearNetOfCurrentPortionOfLeaseLiability

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccruedProfessionalFeesCurrent
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleSecurities
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAmortizedCost
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent

us-gaap:AvailableForSaleSecuritiesNoncurrent

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNetCurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:ContractWithCustomerAssetNetNoncurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:PlanName
us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:DeferredOfferingCosts

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:CounterpartyName, us-gaap:SubsequentEventType
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:InterestReceivableCurrent
us-gaap:BalanceSheetLocation
us-gaap:InvestmentsAndCash

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:CreditFacility
us-gaap:LineOfCredit

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority

us-gaap:RestrictedCashNoncurrent
us-gaap:CreditFacility

us-gaap:SecurityDeposit
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:SharePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:SharesIssuedPricePerShare
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforwardAmount

Plots across concepts


IncomeStatement
Operating Income Loss
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Property Plant And Equipment Net
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:CommonStockValue ██▆▆▆▁▁▁▁▁▁0.0070.0070.0060.0060.0060.0040.0040.0040.0040.0040.004NANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding NANA63.52793265.14570748.55684344.282607NA43.939281NANANANANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic NANA63.52793262.59919350.1531645.953213NA45.78713745.40958844.532073NA44.45218444.45031211.598421NA3.994915
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted █▁69.74529767.082161NANA48.55684344.28260744.05640743.93928143.79771843.50859243.16341242.83809842.5336419.4883522.2080651.949258
us-gaap:EarningsPerShareBasic NANANA0.03NANANA-0.51NANANANANANANANA
us-gaap:EarningsPerShareDiluted NANANA0.03NANANA-0.51NANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted ▁█-1.09-1.08NANA-0.93-0.63-0.3699999999999999-0.51-0.64-0.41-0.27-0.25-0.32-1.37-5.560000000000002-11.86
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare NANA-8.2e-073e-08-9.300000000000001e-07-6.3e-07NA-5.1e-07NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare NANA-8.2e-073e-08-9.300000000000001e-07-6.3e-07NA-5.1e-07NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:AllocatedShareBasedCompensationExpense █▁13.36712.761NA6.0024.473.462NA2.742.131.674NA1.0481.1160.656NA0.136
us-gaap:ComprehensiveIncomeNetOfTax ▁▁▃█▄▅▆▆▅▆▇▇▇▇▇▆-76.014-72.639-51.891.759-45.218-27.529-16.587-22.411-28.006-17.534-12.294-10.837-13.519-13.009-13.243-23.108
us-gaap:GeneralAndAdministrativeExpense ██▆▅▅▃▃▄▃▂▂▂▂▁▁▁16.82615.82112.78711.17711.4327.0086.5917.7585.9114.9693.613.5773.452.9292.4481.862
us-gaap:NetIncomeLoss ▁▁▃█▄▅▆▆▅▆▇▇▇▇▇▆-75.97-72.593-51.8531.822-45.074-27.753-16.598-22.352-28.09-17.67-12.295-10.812-13.533-12.954-13.21-23.122
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-75.97-72.593NA1.822-45.074-27.753NA-22.352-28.09-17.67NA-10.812-13.533-12.954NANA
us-gaap:NonoperatingIncomeExpense ▁▁▁▂▂▃▄▄▄▄▄▅█▂▁▁0.1660.1540.1590.270.3010.6470.9290.8971.071.1031.1891.3332.3660.3770.1340.012
us-gaap:OperatingExpenses ██▆▆▄▃▂▂▃▂▁▁▁▁▁▂85.59782.20861.49962.97847.12530.1527.27724.99930.9120.52315.04616.43617.14914.58114.59423.297
us-gaap:OperatingIncomeLoss ▁▁▃█▄▅▆▆▅▆▇▇▆▇▇▆-76.136-72.747-52.0121.552-45.375-28.4-17.527-23.249-29.16-18.773-13.484-12.145-15.899-13.331-13.344-23.134
us-gaap:OtherComprehensiveIncomeLossNetOfTax █▁-0.044-0.046NA-0.063-0.1440.224NA-0.060.0840.136NA-0.0250.014-0.055NANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome█▁-0.044-0.046NA-0.063-0.1440.224NA-0.060.0840.136NA-0.0250.014-0.055NANA
us-gaap:ProfitLoss ▁▁▃█▄▅▆▆▅▆▇▇▇▇▇-75.97-72.593-51.8531.822-45.074-27.753-16.598-22.352-28.09-17.67-12.295-10.811-13.534-12.954-13.21NA
us-gaap:ResearchAndDevelopmentExpense ██▆▆▄▂▂▂▃▂▁▁▁▁▁▂68.77166.38748.71251.80135.69323.14220.68617.24124.99915.55411.43612.85913.69911.65212.14621.435
 us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost us-gaap:CounterpartyName,us-gaap:TypeOfArrangement rcus:StrataOncologyInc,rcus:StrataAgreement▁█0.50.6NA0.30.60.4NANANANANANANANANANA
 us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost us-gaap:TypeOfArrangement rcus:AstraZenecaAgreement0.3NANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▂▂▂█▁▁▂▁▁▁▁▁▁▁▁▁9.4619.4619.48764.531.751.759.751.751.751.751.5624.2911.251.251.250.163
us-gaap:Revenues ▂▂▂█▁▁▂▁▁▁▁▁▁▁▁▁9.4619.4619.48764.531.751.759.751.751.751.751.5624.2911.251.251.250.163
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:Assets ██▆▇▄▁▁▁▂▂▂▂▂▂▁898.773935.119772.292811.075481.389176.144203.11216.957238.974258.53274.925286.721293.865305.399190.486NA
us-gaap:Liabilities █▇▇▇▁▁▁▁▁▁▁▁▁▁▁294.218270.329269.988266.65852.67935.50639.26839.7342.32836.96339.98341.639.29138.80836.618NA
us-gaap:LiabilitiesAndStockholdersEquity ██▆▇▄▁▁▁▂▂▂▂▂▂▁898.773935.119772.292811.075481.389176.144203.11216.957238.974258.53274.925286.721293.865305.399190.486NA
us-gaap:StockholdersEquity ▇█▆▇▆▃▃▃▄▄▄▄▄▄▁604.555664.79502.304544.417428.71140.638163.842177.227196.646221.567234.942245.121254.574266.591-72.328NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:AssetsCurrent ▇█▇█▄▁▁▁▂▂▂▂▂▂▁745.954841.87735.815797.199471.599166.217192.705200.488227.733245.015258.948265.28267.441282.068176.869NA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▇█▄▅▆▂▂▂▂▂▂▂▄▄▃▁320.482390.26173.415221.849285.18567.32657.93778.99276.06868.49971.06474.889169.998198.11698.42618.306
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▄▂▅▄▃▂▂▂▂▁▁▁▁▁21.9678.685.47111.8168.6658.0074.3034.2233.2733.082.3212.3291.551.8341.141NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:PropertyPlantAndEquipmentGross NANA25.095NANANA20.55120.37619.84119.62218.7518.45818.23516.61915.208NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType rcus:CapitalizedSoftwareNANA0.225NANANA0.1460.1460.1460.1460.1460.1460.1460.1310.131NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA2.336NANANA0.2380.240.2850.3860.3350.2540.3380.7510.119NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:EquipmentNANA9.902NANANA8.1688.0367.5367.46.6286.4596.1975.5625.053NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA1.521NANANA1.1651.121.040.8620.8130.7710.730.6610.625NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA11.111NANANA10.83410.83410.83410.82810.82810.82810.8249.5149.28NA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA14.288NANANA11.22110.3659.4798.5967.6436.6965.7224.8063.978NA
us-gaap:PropertyPlantAndEquipmentNet █▄▂▁▁▁▁▂▂▂▂▃▃▃▂23.80614.84910.8078.7288.2648.7619.3310.01110.36211.02611.10711.76212.51311.81311.23NA
us-gaap:OperatingLeaseRightOfUseAsset █▁▁36.13712.24312.781NANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇██▃▂▂▂▁▁▁▁▁▁▁▃5.7756.1836.2462.2451.3230.9630.8720.2630.3190.3150.2840.2050.2050.2051.502NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:AccountsPayableCurrent ▆█▅▃▄▁▂▁▁▁▁▁▂▂▂16.95724.54415.6828.10212.0522.4264.7042.9052.4482.8293.1022.1095.3883.923.82NA
us-gaap:AccruedLiabilitiesCurrent ▅▃▅▃▂▅▅▅█▄▃▃▂▁▁9.7067.5369.5437.4965.61110.179.5229.66215.5527.6296.0236.6674.3423.613.137NA
us-gaap:ContractWithCustomerLiabilityCurrent ▅▅▅█▁▁▁▁▁▁74.57174.57174.571115.6147.07.07.07.07.07.0NANANANANANA
us-gaap:LiabilitiesCurrent ▆▇▆█▂▁▁▁▂▁▁▁▁▁▁130.37132.055121.669162.87140.02521.00422.70621.05726.51319.00316.93516.61116.3814.26212.726NA
us-gaap:OperatingLeaseLiabilityCurrent 2.5NA2.9NANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA9.5430.6171.1940.4830.1960.1210.0730.1930.1630.1860.2580.30.212NA
us-gaap:OtherLiabilitiesCurrent ▁▅██▃▃▃▃▃▄▄▄▄▄▂0.382.3813.5663.4221.4631.4081.481.491.5131.5451.561.5851.651.7320.769NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:OtherLiabilitiesNoncurrent ███▇▁▁▁▁▂▂▂▂▂▂▁10.19910.19910.2468.1780.6930.640.8061.0261.2831.5431.7922.0472.3082.5540.565NA
us-gaap:OperatingLeaseLiabilityNoncurrent █▁▁49.74114.70615.243NANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 5.908NA4.041NANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree 6.101NA3.409NANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour 6.302NA3.522NANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA3.64NANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:StockholdersEquity ▇█▆▇▆▃▃▃▄▄▄▄▄▄▁604.555664.79502.304544.417428.71140.638163.842177.227196.646221.567234.942245.121254.574266.591-72.328NA
us-gaap:CommonStockValue ██▆▆▆▁▁▁▁▁▁0.0070.0070.0060.0060.0060.0040.0040.0040.0040.0040.004NANANANANA
us-gaap:AdditionalPaidInCapital ██▆▆▆▃▃▃▃▃▃▃▃▃▁1081.3411065.562830.438820.661706.713373.425369.1365.898362.905359.82357.873355.758354.375352.8720.948NA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▄▄▄▅▆▆▆▇▇▇███-476.747-400.777-328.184-276.331-278.153-233.079-205.326-188.728-166.376-138.286-122.828-110.533-99.722-86.188-73.234NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▃▄▄▅█▄▄▅▃▁▁▁▁▂-0.046-0.0020.0440.0810.1440.2880.0640.0530.1130.029-0.107-0.108-0.083-0.097-0.042NA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName,us-gaap:StatementEquityComponents,us-gaap:TypeOfArrangement rcus:GileadSciencesInc,us-gaap:AdditionalPaidInCapital,rcus:CommonStockPurchaseAgreementNA220.295NA107.468NANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName,us-gaap:StatementEquityComponents,us-gaap:TypeOfArrangement rcus:GileadSciencesInc,us-gaap:CommonStock,rcus:CommonStockPurchaseAgreementNA0.001NANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName,us-gaap:SubsequentEventType,us-gaap:TypeOfArrangement rcus:GileadSciencesInc,us-gaap:SubsequentEvent,rcus:CommonStockPurchaseAgreementNANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName,us-gaap:TypeOfArrangement rcus:GileadSciencesInc,rcus:CommonStockPurchaseAgreementNA220.296NA107.468NANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:RelatedPartyTransactionsByRelatedParty,us-gaap:TypeOfArrangement rcus:GileadSciencesInc,rcus:CommonStockPurchaseAgreement▁█0.0327.8NANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁13.36712.761NA6.0024.473.462NA2.742.131.674NA1.0481.1160.656NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▁▂█▂▂▃▂▂▂▃▃▃▂▃▂-73.995-66.316-49.88216.265-23.938-31.277-9.471-27.399-19.753-16.839-7.107-11.765-10.877-13.24715.587-24.234
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇█▇▁▆█▇▇▇▇▇▆▇▇▆▇3.00362.826-0.231-387.119-87.07340.056-12.10430.36426.67314.2792.511-83.337-16.123-16.491-42.06612.731
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▆▁▃█▁▁▁▁▁▁▁▁▄▃▁2.231222.121.677107.518328.870.610.52-0.0410.649-0.0050.771-0.007-1.118129.428106.5990.189
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂█▂▂█▃▃▃▃▃▃▁▂▅-68.761218.63-48.434-63.336217.8599.389-21.0552.9247.569-2.565-3.825-95.109-28.11899.69NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:IncreaseDecreaseInAccountsPayable ▁█▇▄█▄▆▅▅▅▅▄▅▅▆▅-11.2917.7226.107-3.5039.01-2.3421.820.472-0.049-0.5170.96-2.3761.653-0.3062.039-0.696
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▁▂█▂▂▃▂▂▂▃▃▃▂▃▂-73.995-66.316-49.88216.265-23.938-31.277-9.471-27.399-19.753-16.839-7.107-11.765-10.877-13.24715.587-24.234
us-gaap:NetIncomeLoss ▁▁▃█▄▅▆▆▅▆▇▇▇▇▇▆-75.97-72.593-51.8531.822-45.074-27.753-16.598-22.352-28.09-17.67-12.295-10.812-13.533-12.954-13.21-23.122
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-75.97-72.593NA1.822-45.074-27.753NA-22.352-28.09-17.67NA-10.812-13.533-12.954NANA
us-gaap:ProfitLoss ▁▁▃█▄▅▆▆▅▆▇▇▇▇▇-75.97-72.593-51.8531.822-45.074-27.753-16.598-22.352-28.09-17.67-12.295-10.811-13.534-12.954-13.21NA
us-gaap:ShareBasedCompensation ██▅▄▃▃▂▂▂▂▁▁▂▁▁▁13.36712.7617.8916.0024.473.4622.4372.742.131.6741.0541.0481.1160.6560.1550.137
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇█▇▁▆█▇▇▇▇▇▆▇▇▆▇3.00362.826-0.231-387.119-87.07340.056-12.10430.36426.67314.2792.511-83.337-16.123-16.491-42.06612.731
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▅▃▂▁▁▁▁▁▂▁▂▂▂▁▂6.0733.6411.5191.0710.2560.2090.1960.550.5510.6280.2581.1271.3041.0540.2940.839
us-gaap:PaymentsToAcquireInvestments ▄▄▄█▃▁▂▂▂▂▂▃▂▂▂▁178.292192.398170.755429.214130.8048.88567.5156.40851.4372.40739.485131.39649.58741.08459.1126.278
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▆▁▃█▁▁▁▁▁▁▁▁▄▃▁2.231222.121.677107.518328.870.610.52-0.0410.649-0.0050.771-0.007-1.118129.428106.5990.189
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7000.07000.06000.06000.06000.04000.04000.04000.04000.04000.04000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-09-30
Value6365484443
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value636250454545444444113.9949153.9002713.549791
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value69674844444343434342429.4883522.2080651.9492581.693151.452215
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2020-09-302019-09-30
Value0.03-0.51
Percentage of EarningsPerShareBasic100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2020-09-302019-09-30
Value0.03-0.51
Percentage of EarningsPerShareDiluted100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.09-1.08-0.93-0.63-0.37-0.51-0.64-0.41-0.27-0.25-0.32-1.37-5.56-11.86-5.64-4.96
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-09-30
Value-0.820.03-0.93-0.63-0.51
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-09-30
Value-0.820.03-0.93-0.63-0.51
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value13126.0024.473.4622.742.131.6741.0481.1160.6560.1360.1310.072
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax141.3134.99.3255.4197.8156.6121.795.724.489.352.583.40.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value6.3996.5912.9272.1021.7261.7621.2620.8270.410.4150.3160.0630.0640.031
Percentage of AllocatedShareBasedCompensationExpense47.951.648.847.049.964.359.249.439.137.248.246.348.943.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax67.669.74.5120.198.6100.772.147.39.633.225.338.70.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value6.9686.173.0752.3681.7360.9780.8680.8470.6380.7010.340.0730.0670.041
Percentage of AllocatedShareBasedCompensationExpense52.148.451.253.050.135.740.850.660.962.851.853.751.156.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.665.24.8135.399.255.949.648.414.956.127.244.80.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-76014000.0-72639000.0-51890000.01759000.0-45218000.0-27529000.0-16587000.0-22411000.0-28006000.0-17534000.0-12294000.0-10837000.0-13519000.0-13009000.0-13243000.0-23108000.0-9539000.0-7208000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.4-767.8-547.02.7-2583.9-1573.1-170.1-1280.6-1600.3-1001.9-787.1-252.6-1081.5-1040.7-1059.4-14176.70.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value16151211117.0086.5917.7585.9114.9693.613.5773.452.9292.4481.8621.831.496
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax177.8167.2134.817.3653.3400.567.6443.3337.8283.9231.183.4276.0234.3195.81142.30.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-75970000.0-72593000.0-51853000.01822000.0-45074000.0-27753000.0-16598000.0-22352000.0-28090000.0-17670000.0-12295000.0-10812000.0-13533000.0-12954000.0-13210000.0-23122000.0-9550000.0-7200000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.3-546.62.8-2575.7-1585.9-170.2-1277.3-1605.1-1009.7-787.1-252.0-1082.6-1036.3-1056.8-14185.30.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-75970000.0-72593000.01822000.0-45074000.0-27753000.0-22352000.0-28090000.0-17670000.0-10812000.0-13533000.0-12954000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.32.8-2575.7-1585.9-1277.3-1605.1-1009.7-252.0-1082.6-1036.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value166000.0154000.0159000.0270000.0301000.0647000.0929000.0897000.01070000.01103000.01189000.01333000.02366000.0377000.0134000.012000.0114000.0100000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.61.70.417.237.09.551.361.163.076.131.1189.330.210.77.40.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value858261624730272430201516171414239.6647.3
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax904.7868.9648.297.62692.91722.9279.81428.51766.31172.7963.3383.01371.91166.51167.514292.60.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-76136000.0-72747000.0-52012000.01552000.0-45375000.0-28400000.0-17527000.0-23249000.0-29160000.0-18773000.0-13484000.0-12145000.0-15899000.0-13331000.0-13344000.0-23134000.0-9664000.0-7300000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-804.7-768.9-548.22.4-2592.9-1622.9-179.8-1328.5-1666.3-1072.7-863.3-283.0-1271.9-1066.5-1067.5-14192.60.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-44000.0-46000.0-63000.0-144000.0224000.0-60000.084000.0136000.0-25000.014000.0-55000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.5-0.1-8.212.8-3.44.87.8-0.61.1-4.4

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-44000.0-46000.0-63000.0-144000.0224000.0-60000.084000.0136000.0-25000.014000.0-55000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.5-0.1-8.212.8-3.44.87.8-0.61.1-4.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-75970000.0-72593000.0-51853000.01822000.0-45074000.0-27753000.0-16598000.0-22352000.0-28090000.0-17670000.0-12295000.0-10811000.0-13534000.0-12954000.0-13210000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.3-546.62.8-2575.7-1585.9-170.2-1277.3-1605.1-1009.7-787.1-251.9-1082.7-1036.3-1056.8

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value686648513523201724151112131112217.8345.804
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax726.9701.7513.580.32039.61322.4212.2985.21428.5888.8732.1299.71095.9932.2971.713150.30.00.0

us-gaap:ResearchAndDevelopmentExpense us-gaap:CounterpartyName

rcus:Genentech


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.30.30.40.10.00.0
Percentage of ResearchAndDevelopmentExpense0.40.50.80.20.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.23.24.20.20.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:Genentech0.00.00.00.00.00.0

Research And Development Expense Excluding Acquired In Process Cost

us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost

rcus:StrataOncologyInc, rcus:StrataAgreement


Research
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value500000.0600000.0300000.0600000.0400000.0
Percentage of ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.30.534.322.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:StrataOncologyInc rcus:StrataAgreement0.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost us-gaap:TypeOfArrangement

rcus:AstraZenecaAgreement


Research
Period End2021-06-30
Value300000.0
Percentage of ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost60.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:AstraZenecaAgreement0.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.4619.4619.487641.751.759.751.751.751.751.5624.2911.251.251.250.163
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

rcus:GileadAccessRights


Revenue
Period End2021-06-302021-03-312020-12-312020-09-30
Value7.7117.7117.7377.684
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax81.581.581.611.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax81.581.581.611.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:GileadAccessRights100.0100.0100.0100.0

rcus:GileadLicenseToZimberelimab


Revenue
Period End2020-12-312020-09-30
Value0.055
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:GileadLicenseToZimberelimab0.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.4619.4619.487641.751.759.751.751.751.751.5624.2911.251.251.250.163
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:CounterpartyName, us-gaap:ProductOrService

rcus:GileadSciencesIncAndTaihoPharmaceuticalCo, rcus:Collaboration


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value9.4619.4619.4879.4341.751.751.751.75
Percentage of Revenues100.0100.0100.014.6100.0100.017.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.014.6100.0100.017.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:GileadSciencesIncAndTaihoPharmaceuticalCo rcus:Collaboration0.00.00.00.00.00.00.00.0

rcus:GileadSciencesIncAndTaihoPharmaceuticalCo, us-gaap:License


Revenuesus-gaap:
Period End2020-12-312020-09-30
Value0.055
Percentage of Revenues0.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:GileadSciencesIncAndTaihoPharmaceuticalCo us-gaap:License0.00.0

rcus:GileadSciencesIncAndTaihoPharmaceuticalCo, us-gaap:LicenseAndService


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value9.4619.4619.487641.751.759.751.75
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax rcus:GileadSciencesIncAndTaihoPharmaceuticalCo us-gaap:LicenseAndService0.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value898935772811481176203216238258274286293305190
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2942702692665235393942363941393836
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.728.935.032.910.920.219.318.317.714.314.514.513.412.719.2

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value898935772811481176203216238258274286293305190
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value604664502544428140163177196221234245254266-72.328-19.994-2.171
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets67.371.165.067.189.179.880.781.782.385.785.585.586.687.3-38.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-0.046-0.0020.0440.0810.1440.2880.0640.0530.1130.029-0.107-0.108-0.083-0.097-0.042-0.026
Percentage of StockholdersEquity-0.0-0.00.00.00.00.20.00.00.10.0-0.0-0.0-0.0-0.00.10.1
Percentage of Assets-0.0-0.00.00.00.00.20.00.00.00.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value108110658308207063733693653623593573553543520.9480.1840.011
Percentage of StockholdersEquity178.9160.3165.3150.7164.8265.5225.3206.5184.5162.4152.3145.1139.2132.4-1.3-0.9-0.5
Percentage of Assets120.3113.9107.5101.2146.8212.0181.7168.7151.9139.2130.2124.1120.6115.50.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0070.0070.0060.0060.0060.0040.0040.0040.0040.0040.0040.0040.0040.004
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-476.747-400.777-328.184-276.331-278.153-233.079-205.326-188.728-166.376-138.286-122.828-110.534-99.722-86.188-73.234-20.152-2.182
Percentage of StockholdersEquity-78.9-60.3-65.3-50.8-64.9-165.7-125.3-106.5-84.6-62.4-52.3-45.1-39.2-32.3101.3100.8100.5
Percentage of Assets-53.0-42.9-42.5-34.1-57.8-132.3-101.1-87.0-69.6-53.5-44.7-38.6-33.9-28.2-38.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value745841735797471166192200227245258265267282176
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets83.090.095.398.398.094.494.992.495.394.894.292.591.092.492.9

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value32039017322128567577876687174169198981829396546
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.741.722.527.459.238.228.536.431.826.525.826.157.864.951.70.00.00.00.00.0

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value218.685.471118.6658.0074.3034.2233.2733.082.3212.3291.551.8341.141
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.40.90.71.51.84.52.11.91.41.20.80.80.50.60.6

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25202019191818181615
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.210.19.48.37.66.86.46.25.48.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

rcus:CapitalizedSoftware


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2250.1460.1460.1460.1460.1460.1460.1460.1310.131
Percentage of PropertyPlantAndEquipmentGross0.90.70.70.70.70.80.80.80.80.9
Percentage of Assets0.00.10.10.10.10.10.10.00.00.1
Percentage of Assets rcus:CapitalizedSoftware0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.3360.2380.240.2850.3860.3350.2540.3380.7510.119
Percentage of PropertyPlantAndEquipmentGross9.31.21.21.42.01.81.41.94.50.8
Percentage of Assets0.30.10.10.10.10.10.10.10.20.1
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:Equipment


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9.9028.1688.0367.5367.46.6286.4596.1975.5625.053
Percentage of PropertyPlantAndEquipmentGross39.539.739.438.037.735.335.034.033.533.2
Percentage of Assets1.34.03.73.22.92.42.32.11.82.7
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.5211.1651.121.040.8620.8130.7710.730.6610.625
Percentage of PropertyPlantAndEquipmentGross6.15.75.55.24.44.34.24.04.04.1
Percentage of Assets0.20.60.50.40.30.30.30.20.20.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11101010101010109.5149.28
Percentage of PropertyPlantAndEquipmentGross44.352.753.254.655.257.758.759.457.261.0
Percentage of Assets1.45.35.04.54.23.93.83.73.14.9
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1411109.4798.5967.6436.6965.7224.8063.978
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.95.54.84.03.32.82.31.91.62.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2314108.7288.2648.7619.331010111111121111
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.61.61.41.11.75.04.64.64.34.34.04.14.33.95.9

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-31
Value361212
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0
Percentage of Assets4.01.31.7

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5775000.06183000.06246000.02245000.01323000.0963000.0872000.0263000.0319000.0315000.0284000.0205000.0205000.0205000.01502000.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.80.30.30.50.40.10.10.10.10.10.10.10.8

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1624158.102122.4264.7042.9052.4482.8293.1022.1095.3883.923.82
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.62.01.02.51.42.31.31.01.11.10.71.81.32.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9.7067.5369.5437.4965.611109.5229.662157.6296.0236.6674.3423.613.137
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.10.81.20.91.25.84.74.56.53.02.22.31.51.21.6

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7474741157.07.07.07.07.07.0
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.38.09.714.31.54.03.43.22.92.7

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1301321211624021222126191616161412
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.514.115.820.18.311.911.29.711.17.46.25.85.64.76.7

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302020-12-31
Value2500000.02900000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.30.4

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9543000.0617000.01194000.0483000.0196000.0121000.073000.0193000.0163000.0186000.0258000.0300000.0212000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.20.10.20.30.10.10.00.10.10.10.10.10.1

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value380000.02381000.03566000.03422000.01463000.01408000.01480000.01490000.01513000.01545000.01560000.01585000.01650000.01732000.0769000.0
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.30.50.40.30.80.70.70.60.60.60.60.60.60.4

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1010108.1780.6930.640.8061.0261.2831.5431.7922.0472.3082.5540.565
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.31.00.10.40.40.50.50.60.70.70.80.80.3

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-31
Value491415
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0
Percentage of Assets5.51.62.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302020-12-31
Value5908000.04041000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets0.70.5

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302020-12-31
Value6101000.03409000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.70.4

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302020-12-31
Value6302000.03522000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0
Percentage of Assets0.70.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value3640000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.5

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302020-12-31
Value5218
Percentage of OperatingLeaseLiability100.0100.0
Percentage of Assets5.82.3

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302020-12-31
Value6822
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets7.62.9

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue us-gaap:StatementGeographical

rcus:BrisbaneCalifornia


Lessee
Period End2021-06-30
Value90
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue131.3
Percentage of Assets10.0
Percentage of Assets rcus:BrisbaneCalifornia0.0

stpr:CA


Lessee
Period End2021-06-30
Value5.3
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue7.7
Percentage of Assets0.6
Percentage of Assets stpr:CA0.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302020-12-31
Value164.153
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets1.80.5

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount us-gaap:StatementGeographical

rcus:BrisbaneCalifornia


Lessee
Period End2020-12-31
Value90
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount2174.3
Percentage of Assets11.7
Percentage of Assets rcus:BrisbaneCalifornia0.0

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount us-gaap:StatementGeographical, us-gaap:SubsequentEventType

stpr:CA, us-gaap:SubsequentEvent


Lessee
Period End2021-04-30
Value43
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount0.0
Percentage of Assets0.0
Percentage of Assets stpr:CA us-gaap:SubsequentEvent0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value604664502544428140163177196221234245254266-72.328-19.994-2.171
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets67.371.165.067.189.179.880.781.782.385.785.585.586.687.3-38.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-0.046-0.0020.0440.0810.1440.2880.0640.0530.1130.029-0.107-0.108-0.083-0.097-0.042-0.026
Percentage of StockholdersEquity-0.0-0.00.00.00.00.20.00.00.10.0-0.0-0.0-0.0-0.00.10.1
Percentage of Assets-0.0-0.00.00.00.00.20.00.00.00.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value108110658308207063733693653623593573553543520.9480.1840.011
Percentage of StockholdersEquity178.9160.3165.3150.7164.8265.5225.3206.5184.5162.4152.3145.1139.2132.4-1.3-0.9-0.5
Percentage of Assets120.3113.9107.5101.2146.8212.0181.7168.7151.9139.2130.2124.1120.6115.50.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0070.0070.0060.0060.0060.0040.0040.0040.0040.0040.0040.0040.0040.004
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-476.747-400.777-328.184-276.331-278.153-233.079-205.326-188.728-166.376-138.286-122.828-110.534-99.722-86.188-73.234-20.152-2.182
Percentage of StockholdersEquity-78.9-60.3-65.3-50.8-64.9-165.7-125.3-106.5-84.6-62.4-52.3-45.1-39.2-32.3101.3100.8100.5
Percentage of Assets-53.0-42.9-42.5-34.1-57.8-132.3-101.1-87.0-69.6-53.5-44.7-38.6-33.9-28.2-38.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7000.07000.06000.06000.06000.04000.04000.04000.04000.04000.04000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value108110658308207063733693653623593573553543520.948
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets120.3113.9107.5101.2146.8212.0181.7168.7151.9139.2130.2124.1120.6115.50.5

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-476750000.0-400780000.0-328180000.0-276330000.0-278150000.0-233080000.0-205330000.0-188730000.0-166380000.0-138290000.0-122830000.0-110530000.0-99722000.0-86188000.0-73234000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-53.0-42.9-42.5-34.1-57.8-132.3-101.1-87.0-69.6-53.5-44.7-38.6-33.9-28.2-38.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-46000.0-2000.044000.081000.0144000.0288000.064000.053000.0113000.029000.0-107000.0-108000.0-83000.0-97000.0-42000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.0-0.00.00.00.00.20.00.00.00.0-0.0-0.0-0.0-0.0-0.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName, us-gaap:StatementEquityComponents, us-gaap:TypeOfArrangement

us-gaap:StockIssuedDuringPeriodValueNewIssues

rcus:GileadSciencesInc, us-gaap:AdditionalPaidInCapital, rcus:CommonStockPurchaseAgreement


Stock
Period End2021-03-312020-09-30
Value220107
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0
Percentage of Assets0.00.0
Percentage of Assets rcus:GileadSciencesInc us-gaap:AdditionalPaidInCapital rcus:CommonStockPurchaseAgreement0.00.0

rcus:GileadSciencesInc, us-gaap:CommonStock, rcus:CommonStockPurchaseAgreement


Stock
Period End2021-03-31
Value0.001
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets rcus:GileadSciencesInc us-gaap:CommonStock rcus:CommonStockPurchaseAgreement0.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, us-gaap:SubsequentEvent, rcus:CommonStockPurchaseAgreement


Stock
Period End2020-07-13
Value200
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets rcus:GileadSciencesInc us-gaap:SubsequentEvent rcus:CommonStockPurchaseAgreement0.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Stock
Period End2021-02-282021-03-312020-07-132020-09-30
Value220220200107
Percentage of StockIssuedDuringPeriodValueNewIssues100.00.0100.00.0
Percentage of Assets0.00.00.00.0
Percentage of Assets rcus:GileadSciencesInc rcus:CommonStockPurchaseAgreement0.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Stock
Period End2021-06-302021-02-282021-03-31
Value0.0220327
Percentage of StockIssuedDuringPeriodValueNewIssues0.0148.80.0
Percentage of Assets0.00.00.0
Percentage of Assets rcus:GileadSciencesInc rcus:CommonStockPurchaseAgreement0.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value13126.0024.473.4622.742.131.6741.0481.1160.656
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value13126.0024.473.4622.742.131.6741.0481.1160.656
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-73.995-66.316-49.88216-23.938-31.277-9.471-27.399-19.753-16.839-7.107-11.765-10.877-13.24715-24.234-6.815-9.597
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-782.1-700.9-525.8335.1-1367.9-1787.3-97.1-1565.7-1128.7-962.2-455.0-274.2-870.2-1059.81247.0-14867.50.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.00362-0.231-387.119-87.07340-12.1043026142.511-83.337-16.123-16.491-42.06612
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.7664.1-2.4-599.9-4975.62288.9-124.11735.11524.2815.9160.8-1942.1-1289.8-1319.3-3365.37810.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.2312221.6771073280.610.52-0.0410.649-0.0050.771-0.007-1.1181291060.189
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.62347.717.7166.618792.634.95.3-2.337.1-0.349.4-0.2-89.410354.28527.9116.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-68.761218-48.434-63.3362179.389-21.0552.9247.569-2.565-3.825-95.109-28.11899
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-726.82310.9-510.5-98.112449.1536.5-215.9167.1432.5-146.6-244.9-2216.5-2249.47975.2

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-11291000.07722000.06107000.0-3503000.09010000.0-2342000.01820000.0472000.0-49000.0-517000.0960000.0-2376000.01653000.0-306000.02039000.0-696000.01082000.0-2692000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-73.995-66.316-49.88216-23.938-31.277-9.471-27.399-19.753-16.839-7.107-11.765-10.877-13.24715-24.234-6.815-9.597
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-782.1-700.9-525.8335.1-1367.9-1787.3-97.1-1565.7-1128.7-962.2-455.0-274.2-870.2-1059.81247.0-14867.50.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-75970000.0-72593000.0-51853000.01822000.0-45074000.0-27753000.0-16598000.0-22352000.0-28090000.0-17670000.0-12295000.0-10812000.0-13533000.0-12954000.0-13210000.0-23122000.0-9550000.0-7200000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.3-546.62.8-2575.7-1585.9-170.2-1277.3-1605.1-1009.7-787.1-252.0-1082.6-1036.3-1056.8-14185.30.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-75970000.0-72593000.01822000.0-45074000.0-27753000.0-22352000.0-28090000.0-17670000.0-10812000.0-13533000.0-12954000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.32.8-2575.7-1585.9-1277.3-1605.1-1009.7-252.0-1082.6-1036.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-75970000.0-72593000.0-51853000.01822000.0-45074000.0-27753000.0-16598000.0-22352000.0-28090000.0-17670000.0-12295000.0-10811000.0-13534000.0-12954000.0-13210000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-803.0-767.3-546.62.8-2575.7-1585.9-170.2-1277.3-1605.1-1009.7-787.1-251.9-1082.7-1036.3-1056.8

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value13127.8916.0024.473.4622.4372.742.131.6741.0541.0481.1160.6560.1550.1370.1310.072
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.00362-0.231-387.119-87.07340-12.1043026142.511-83.337-16.123-16.491-42.06612
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.7664.1-2.4-599.9-4975.62288.9-124.11735.11524.2815.9160.8-1942.1-1289.8-1319.3-3365.37810.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6073000.03641000.01519000.01071000.0256000.0209000.0196000.0550000.0551000.0628000.0258000.01127000.01304000.01054000.0294000.0839000.02242000.02139000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1781921704291308.88567565172391314941596.2781021
Percentage of PaymentsToAcquireInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.2312221.6771073280.610.52-0.0410.649-0.0050.771-0.007-1.1181291060.189
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.62347.717.7166.618792.634.95.3-2.337.1-0.349.4-0.2-89.410354.28527.9116.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value13.889.07.551.711.20.4
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3200000.02165000.01084000.0622000.0242000.019000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value84503018
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0

Proceeds From Sale Of Short Term Investments

us-gaap:ProceedsFromSaleOfShortTermInvestments

us-gaap:ProceedsFromSaleOfShortTermInvestments


Proceeds
Period End2020-12-312018-06-302018-03-312017-06-302017-03-31
Value0.034259.0857.0
Percentage of ProceedsFromSaleOfShortTermInvestments0.0100.0100.0100.0100.0

rcus:AccessRightsRelatedToCompanySResearchAndDevelopmentPipeline

rcus:AccessRightsRelatedToCompanySResearchAndDevelopmentPipeline


Access
Period End2020-12-31
Value0.46
Percentage of AccessRightsRelatedToCompanySResearchAndDevelopmentPipeline100.0

rcus:AllocationOfTransactionPrice

rcus:AllocationOfTransactionPrice


Allocation
Period End2020-12-31
Value0.874
Percentage of AllocationOfTransactionPrice100.0

rcus:AllocationToPerformanceObligations

rcus:AllocationToPerformanceObligations


Allocation
Period End2020-12-31
Value0.874
Percentage of AllocationToPerformanceObligations100.0

rcus:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities

rcus:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities


Cash
Period End2021-06-302021-03-312020-06-302020-03-31
Value1073000.0927000.0526000.0519000.0
Percentage of CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities100.0100.0100.0100.0

rcus:ClinicalAndRegulatoryMilestonesAchievedUnderLicenseAgreement us-gaap:CounterpartyName

rcus:ClinicalAndRegulatoryMilestonesAchievedUnderLicenseAgreement

rcus:WuXiBiologicsLicenseAgreement


Clinical
Period End2020-12-31
Value16
Percentage of ClinicalAndRegulatoryMilestonesAchievedUnderLicenseAgreement100.0

rcus:ClinicalRegulatoryAndCommercializationRemainingMilestonePayments us-gaap:CounterpartyName

rcus:ClinicalRegulatoryAndCommercializationRemainingMilestonePayments

rcus:AbmunoLicenseAgreement


Clinical
Period End2021-06-302021-03-31
Value0.093
Percentage of ClinicalRegulatoryAndCommercializationRemainingMilestonePayments0.0100.0

rcus:ConsultantAndLegalFees us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ConsultantAndLegalFees

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Consultant
Period End2020-07-13
Value7300000.0
Percentage of ConsultantAndLegalFees100.0

rcus:ContractWithCustomerInitialTransactionPrice us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ContractWithCustomerInitialTransactionPrice

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contract
Period End2020-07-13
Value364
Percentage of ContractWithCustomerInitialTransactionPrice100.0

rcus:ContractualObligationForFirstPayment us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ContractualObligationForFirstPayment

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contractual
Period End2020-07-13
Value100
Percentage of ContractualObligationForFirstPayment100.0

rcus:ContractualObligationRemainingAmountNotObligatedToPay us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ContractualObligationRemainingAmountNotObligatedToPay

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contractual
Period End2020-07-13
Value300
Percentage of ContractualObligationRemainingAmountNotObligatedToPay100.0

rcus:DeferredRevenueFromRelatedParty

rcus:DeferredRevenueFromRelatedParty


Deferred
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.7117.7110.00.0
Percentage of DeferredRevenueFromRelatedParty100.0100.00.00.0

rcus:DevelopmentAndCommercializationServicesForZimberelimab

rcus:DevelopmentAndCommercializationServicesForZimberelimab


Development
Period End2020-12-31
Value23000.0
Percentage of DevelopmentAndCommercializationServicesForZimberelimab100.0

rcus:DirectOfferingCost us-gaap:TypeOfArrangement

rcus:DirectOfferingCost

rcus:CommonStockPurchaseAgreement


Direct
Period End2020-07-13
Value1900000.0
Percentage of DirectOfferingCost100.0

rcus:DomvanalimabOption

rcus:DomvanalimabOption


Domvanalimab
Period End2020-12-31
Value0.088
Percentage of DomvanalimabOption100.0

rcus:DomvanalimabOptionPaymentUponAchievementOfCertainDevelopmentMilestones us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:DomvanalimabOptionPaymentUponAchievementOfCertainDevelopmentMilestones

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Domvanalimab
Period End2020-07-13
Value275
Percentage of DomvanalimabOptionPaymentUponAchievementOfCertainDevelopmentMilestones100.0

rcus:EtrumadenantOption

rcus:EtrumadenantOption


Etrumadenant
Period End2020-12-31
Value0.303
Percentage of EtrumadenantOption100.0

rcus:FairValueOfStockPurchased us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:FairValueOfStockPurchased

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Fair
Period End2021-06-302021-03-312020-12-31
Value0.01090.0
Percentage of FairValueOfStockPurchased0.0100.00.0

rcus:FundsReceivedForStockPurchaseAgreement us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:FundsReceivedForStockPurchaseAgreement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Funds
Period End2021-06-302021-03-312020-12-31
Value0.02000.0
Percentage of FundsReceivedForStockPurchaseAgreement0.0100.00.0

rcus:IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses

rcus:IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value5.7334.716-9.93147.1012.226-1.233-7.105
Percentage of IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses100.0100.0100.0100.0100.0100.0100.0100.0

rcus:IncreaseDecreaseInDeferredRent

rcus:IncreaseDecreaseInDeferredRent


Increase
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1007000.0-137000.0-129000.0-141000.0-135000.0-135000.0-127000.0-124000.0-120000.0-139000.0-85000.0687000.0-162000.0-163000.0-153000.0
Percentage of IncreaseDecreaseInDeferredRent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:IncreaseDecreaseInOperatingLeaseLiabilities

rcus:IncreaseDecreaseInOperatingLeaseLiabilities


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-398000.0-605000.0-287000.0-273000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities100.0100.0100.0100.0

rcus:InterestAndOtherIncomeExpenseNonoperatingNet

rcus:InterestAndOtherIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value166000.0154000.0159000.0270000.0301000.0647000.0929000.01254000.01482000.01534000.01512000.01519000.01288000.0603000.0
Percentage of InterestAndOtherIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:MilestoneExpense us-gaap:CounterpartyName

rcus:MilestoneExpense

rcus:AbmunoLicenseAgreement


Milestone
Period End2021-06-302021-03-312020-09-30
Value05000000.03000000.0
Percentage of MilestoneExpense0.0100.0100.0

rcus:WuXiBiologicsLicenseAgreement


Milestone
Period End2021-06-302021-03-312020-09-302020-06-30
Value010000000.005000000.0
Percentage of MilestoneExpense0.0200.00.00.0

rcus:MilestonePayments us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

rcus:MilestonePayments

rcus:StrataOncologyInc, us-gaap:ResearchAndDevelopmentExpense, rcus:StrataAgreement


Milestone
Period End2021-06-30
Value0
Percentage of MilestonePayments0.0

rcus:NetExpensesOfInception us-gaap:CounterpartyName

rcus:NetExpensesOfInception

rcus:Genentech


Net
Period End2021-06-302021-03-31
Value200000.0800000.0
Percentage of NetExpensesOfInception100.0100.0

rcus:NonRefundableAndNonCreditableUpfrontCashPayments us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:NonRefundableAndNonCreditableUpfrontCashPayments

rcus:TaihoPharmaceuticalCoLtd, rcus:OptionAndLicenseAgreement


Non
Period End2021-06-302021-03-312020-12-312019-09-302019-06-302019-03-31
Value0.0350.00.00.035
Percentage of NonRefundableAndNonCreditableUpfrontCashPayments0.0100.00.00.00.0100.0

rcus:OptionFeePerProgramForAllOtherProgramsEnteringClinicalDevelopmentToExerciseOption us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:OptionFeePerProgramForAllOtherProgramsEnteringClinicalDevelopmentToExerciseOption

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Option
Period End2020-07-13
Value150
Percentage of OptionFeePerProgramForAllOtherProgramsEnteringClinicalDevelopmentToExerciseOption100.0

rcus:OptionFeePerProgramForCurrentClinicalProgramsToExerciseOption us-gaap:CounterpartyName, us-gaap:Range, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

rcus:OptionFeePerProgramForCurrentClinicalProgramsToExerciseOption

rcus:GileadSciencesInc, srt:Maximum, us-gaap:SubsequentEvent, rcus:OptionLicenseAndCollaborationAgreement


Option
Period End2020-07-13
Value275
Percentage of OptionFeePerProgramForCurrentClinicalProgramsToExerciseOption100.0

rcus:GileadSciencesInc, srt:Minimum, us-gaap:SubsequentEvent, rcus:OptionLicenseAndCollaborationAgreement


Option
Period End2020-07-13
Value200
Percentage of OptionFeePerProgramForCurrentClinicalProgramsToExerciseOption72.7

rcus:OptionPaymentUponAchievementOfCertainDevelopmentMilestones us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:OptionPaymentUponAchievementOfCertainDevelopmentMilestones

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Option
Period End2020-07-13
Value250
Percentage of OptionPaymentUponAchievementOfCertainDevelopmentMilestones100.0

rcus:PaymentForAccessRightsRelatedToTheCompanySResearch

rcus:PaymentForAccessRightsRelatedToTheCompanySResearch


Payment
Period End2020-12-31
Value0.874
Percentage of PaymentForAccessRightsRelatedToTheCompanySResearch100.0

rcus:PercentageOfOptionToPurchaseMaximumSharesOfCommonStock us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:PercentageOfOptionToPurchaseMaximumSharesOfCommonStock

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Percentage
Period End2020-07-13
Value35.0
Percentage of PercentageOfOptionToPurchaseMaximumSharesOfCommonStock100.0

rcus:PercentageOfPremiumPurchasePriceOfCommonStock us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:PercentageOfPremiumPurchasePriceOfCommonStock

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Percentage
Period End2020-07-13
Value20.0
Percentage of PercentageOfPremiumPurchasePriceOfCommonStock100.0

rcus:PremiumFromStockPurchaseAgreement

rcus:PremiumFromStockPurchaseAgreement


Premium
Period End2020-12-31
Value0.0
Percentage of PremiumFromStockPurchaseAgreement0.0

rcus:PremiumPaidOnStockPurchaseAgreement us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:PremiumPaidOnStockPurchaseAgreement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Premium
Period End2021-06-302021-03-312020-12-31
Value0.0900.0
Percentage of PremiumPaidOnStockPurchaseAgreement0.0100.00.0

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Premium
Period End2020-07-13
Value90
Percentage of PremiumPaidOnStockPurchaseAgreement0.0

rcus:ProceedsFromIssuanceOfCommonStockToRelatedParty

rcus:ProceedsFromIssuanceOfCommonStockToRelatedParty


Proceeds
Period End2021-03-31
Value220
Percentage of ProceedsFromIssuanceOfCommonStockToRelatedParty100.0

rcus:ProceedsFromSaleOfShortTermAndLongTermInvestments

rcus:ProceedsFromSaleOfShortTermAndLongTermInvestments


Proceeds
Period End2021-06-302021-03-31
Value07500000.0
Percentage of ProceedsFromSaleOfShortTermAndLongTermInvestments0.0100.0

rcus:ReceivableFromRelatedParty

rcus:ReceivableFromRelatedParty


Receivable
Period End2021-06-302021-03-312020-06-302020-03-31
Value-3600000.03981000.000
Percentage of ReceivableFromRelatedParty100.0100.00.00.0

rcus:ReimbursementOfMilestoneExpenseOfCostSharingProvisions us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement

rcus:ReimbursementOfMilestoneExpenseOfCostSharingProvisions

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Reimbursement
Period End2021-06-302021-03-31
Value04000000.0
Percentage of ReimbursementOfMilestoneExpenseOfCostSharingProvisions0.0100.0

rcus:ReimbursementOfResearchAndDevelopmentExpenseExcludingAcquiredInProcessCosts us-gaap:TypeOfArrangement

rcus:ReimbursementOfResearchAndDevelopmentExpenseExcludingAcquiredInProcessCosts

rcus:DevelopmentAndCommercializationServices


Reimbursement
Period End2020-09-30
Value500000.0
Percentage of ReimbursementOfResearchAndDevelopmentExpenseExcludingAcquiredInProcessCosts100.0

rcus:RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts us-gaap:IncomeStatementLocation

rcus:RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts

us-gaap:ResearchAndDevelopmentExpense


Related
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1176000.0-4924000.000
Percentage of RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts100.0100.00.00.0

rcus:RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ResearchAndDevelopmentExpense, rcus:GileadSciencesInc


Related
Period End2021-06-302021-03-31
Value1200000.04900000.0
Percentage of RelatedPartyTransactionReimbursementFromRelatedPartyForSharedCosts-102.0-99.5

rcus:RepurchaseOfUnvestedSharesOfStock

rcus:RepurchaseOfUnvestedSharesOfStock


Repurchase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5000.016000.0033000.0043000.046000.05000.0000
Percentage of RepurchaseOfUnvestedSharesOfStock100.0100.00.0100.00.0100.0100.0100.00.00.00.0

rcus:StockIssuedDuringPeriodValueDeterminedToPremiumOnPurchaseOfCommonStockAndAllocatedToPerformanceObligation us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:StockIssuedDuringPeriodValueDeterminedToPremiumOnPurchaseOfCommonStockAndAllocatedToPerformanceObligation

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Stock
Period End2020-07-13
Value90
Percentage of StockIssuedDuringPeriodValueDeterminedToPremiumOnPurchaseOfCommonStockAndAllocatedToPerformanceObligation100.0

rcus:StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock

rcus:StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock


Stock
Period End2021-06-302021-03-31
Value843000.01885000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock100.0100.0

rcus:StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-31
Value843000.01885000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercisedAndVestingOfRestrictedStock100.0100.0

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value175000.0183000.0216000.0220000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption100.0100.0100.0100.0

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value175000.0183000.0216000.0220000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOption100.0100.0100.0100.0

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value208000.0216000.0220000.0252000.0260000.0273000.0335000.0387000.0278000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value208000.0216000.0220000.0252000.0260000.0273000.0335000.0387000.0278000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptionsAndRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:SubLicenseFeesIncurred us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation

rcus:SubLicenseFeesIncurred

rcus:WuXiBiologicsLicenseAgreement, us-gaap:ResearchAndDevelopmentExpense


Sub
Period End2021-06-30
Value0.0
Percentage of SubLicenseFeesIncurred0.0

rcus:SubLicenseFeesIncurred us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Sub
Period End2020-07-13
Value10
Percentage of SubLicenseFeesIncurred0.0

rcus:UnrealizedGainLossOnEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

rcus:UnrealizedGainLossOnEquityMethodInvestments

rcus:PACTPharma


Unrealized
Period End2021-06-302021-03-312020-12-31
Value-800000.0-800000.0-100000.0
Percentage of UnrealizedGainLossOnEquityMethodInvestments100.0100.0100.0

rcus:UpfrontAndMilestonePayments us-gaap:CounterpartyName

rcus:UpfrontAndMilestonePayments

rcus:AbmunoLicenseAgreement


Upfront
Period End2021-06-302021-03-312020-09-302020-06-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0149.60.00.00.00.02.00.00.80.00.00.03.8
Percentage of UpfrontAndMilestonePayments0.0100.0100.00.00.00.00.0100.00.0100.00.00.00.0100.0

rcus:UpfrontAndMilestonePayments us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation

rcus:WuXiBiologicsLicenseAgreement, us-gaap:ResearchAndDevelopmentExpense


Upfront
Period End2021-06-302020-09-302020-06-302019-06-30
Value0.05.00.07.5
Percentage of UpfrontAndMilestonePayments0.052.10.00.0

rcus:UpfrontCashPayment

rcus:UpfrontCashPayment


Upfront
Period End2020-12-31
Value0.0
Percentage of UpfrontCashPayment0.0

rcus:UpfrontCashPayment us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation

rcus:WuXiBiologicsLicenseAgreement, us-gaap:ResearchAndDevelopmentExpense


Upfront
Period End2020-12-31
Value0.5
Percentage of UpfrontCashPayment0.0

rcus:UpfrontCashPayment us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, us-gaap:SubsequentEvent, rcus:OptionLicenseAndCollaborationAgreement


Upfront
Period End2020-07-13
Value175
Percentage of UpfrontCashPayment0.0

rcus:UpfrontCashPayment us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Upfront
Period End2021-06-302021-03-312020-12-312020-07-13
Value0.01750.0175
Percentage of UpfrontCashPayment0.00.00.00.0

rcus:VestingOfEarlyExercisedStockOptions

rcus:VestingOfEarlyExercisedStockOptions


Vesting
Period End2021-06-302021-03-312020-06-302020-03-31
Value175000.0183000.0216000.0220000.0
Percentage of VestingOfEarlyExercisedStockOptions100.0100.0100.0100.0

rcus:VestingOfEarlyExercisedStockOptionsAndRestrictedStock

rcus:VestingOfEarlyExercisedStockOptionsAndRestrictedStock


Vesting
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value205000.0207000.0216000.0220000.0245000.0251000.0260000.0273000.0294000.0335000.0369000.0278000.095000.054000.0
Percentage of VestingOfEarlyExercisedStockOptionsAndRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:ZimberelimabLicense

rcus:ZimberelimabLicense


Zimberelimab
Period End2020-12-31
Value0.0
Percentage of ZimberelimabLicense0.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-906000.0-506000.0-287000.010000.075000.0248000.0425000.0633000.0833000.0747000.0735000.01017000.00082000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:AdjustmentForAmortization us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:AdjustmentForAmortization

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-30
Value100000.0100000.0-900000.01100000.0
Percentage of AdjustmentForAmortization100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Adjustments
Period End2021-03-312020-09-30
Value0.0551.931
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3704000.02784000.01338000.0135000.034000.076000.0-21000.0-15000.0-332000.0380000.033000.0-904000.0312000.0695000.0315000.0-472000.0-605000.01100000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value7.77.77.762
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0

us-gaap:DeferredRevenueRevenueRecognized1

us-gaap:DeferredRevenueRevenueRecognized1


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.4619.4611.751.751.751.751.751.751.751.75
Percentage of DeferredRevenueRevenueRecognized1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value820000.0800000.0778000.0742000.0787000.0842000.0856000.0800000.0800000.0953000.0947000.0900000.0900000.0828000.0766000.0732000.0628000.0486000.0
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfEquityInvestments

us-gaap:GainLossOnSaleOfEquityInvestments


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00131000.0482000.00000001229000.0
Percentage of GainLossOnSaleOfEquityInvestments0.00.0100.0100.00.00.00.00.00.00.0100.0

us-gaap:GainLossOnSaleOfEquityInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

rcus:PACTPharma


Gain
Period End2020-12-312020-09-302020-06-302020-03-31
Value500000.01500000.0200000.01300000.0
Percentage of GainLossOnSaleOfEquityInvestments0.00.0152.7269.7

us-gaap:IncomeLossFromContinuingOperationsPerBasicAndDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicAndDilutedShare


Income
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.09-1.08-0.93-0.63-0.38-0.51-0.64-0.41-0.28-0.25-0.32-1.37-5.98-11.86-5.64-4.96
Percentage of IncomeLossFromContinuingOperationsPerBasicAndDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-131000.0-482000.00-357000.0-412000.0-431000.0-323000.0-186000.0-151000.0-226000.0-156000.0-119000.0-71000.0-70000.0
Percentage of IncomeLossFromEquityMethodInvestments0.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

rcus:PACTPharma


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1200000.00-100000.0-500000.00-400000.0-400000.0-400000.0-300000.0-200000.0-200000.0-200000.0-100000.0-70000.0-70000.0-70000.0
Percentage of IncomeLossFromEquityMethodInvestments0.00.076.3103.70.0112.097.192.892.9107.5132.588.564.158.898.6100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1824000.013000.0648000.0-140000.0-5890000.07923000.01606000.0-644000.02329000.01402000.0410000.0971000.0-210000.01290000.0-469000.0
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerAsset


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-31
Value-3.664.186-1.532.357-0.1220.212-5.1440.0-5.0
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-9.461-9.461-9.511191-1.75-1.75-1.753.25-1.75-1.75-1.5623.709-1.25-1.25
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value2170000.0-2007000.02239000.0-1578000.0
Percentage of IncreaseDecreaseInOtherAccruedLiabilities100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-408000.0-63000.04001000.01238000.044000.091000.0609000.0-56000.05000.030000.080000.0000
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.0-0.0022.2287.663
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities0.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4518000.04568000.0-7047000.03284000.0897000.03704000.080000.0950000.0193000.0759000.0-8000.0779000.0-284000.0693000.0-537000.0922000.0270000.096000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares

us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares


Incremental
Period End2020-09-30
Value7588.0
Percentage of IncrementalCommonSharesAttributableToContingentlyIssuableShares100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2020-09-30
Value2538900.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302020-06-30
Value1500000.0500000.0
Percentage of OperatingLeaseCost100.0100.0

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value579000.0538000.0150000.0144000.0
Percentage of OperatingLeaseRightOfUseAssetAmortizationExpense100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-44000.0-46000.0-37000.0-63000.0-144000.0224000.011000.0-59000.084000.0136000.01000.0-25000.014000.0-55000.0-33000.014000.011000.0-8000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-03-31
Value0.01073250.6430.0
Percentage of ProceedsFromIssuanceOfCommonStock0.0100.0100.0100.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:CounterpartyName, us-gaap:SubsequentEventType

rcus:GileadSciencesInc, us-gaap:SubsequentEvent


Proceeds
Period End2021-02-24
Value220
Percentage of ProceedsFromIssuanceOfCommonStock0.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Proceeds
Period End2021-01-312020-07-13
Value220107
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2237000.01885000.01682000.0270000.02358000.0643000.0520000.02000.0
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit us-gaap:StatementGeographical, us-gaap:SubsequentEventType

us-gaap:ProceedsFromLinesOfCredit

stpr:CA, us-gaap:SubsequentEvent


Proceeds
Period End2021-04-30
Value1000000.0
Percentage of ProceedsFromLinesOfCredit100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value187251172434249558778874249342517
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromRelatedParties

us-gaap:RevenueFromRelatedParties


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.7117.7110.00.0
Percentage of RevenueFromRelatedParties100.0100.00.00.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-30
Value100000.0
Percentage of ShortTermLeaseCost100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:StockIssuedDuringPeriodSharesNewIssues

rcus:GileadSciencesInc, us-gaap:SubsequentEvent, rcus:CommonStockPurchaseAgreement


Stock
Period End2020-07-13
Value5.963029
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302020-06-302019-06-30
Value1394000.0607000.0596000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-06-302019-06-30
Value1394000.0607000.0596000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302018-03-31
Value270000.01751000.0643000.01000.099000.080000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302018-03-31
Value270000.01751000.0643000.01000.099000.080000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation

us-gaap:WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1348900.01394600.0-32819.01533100.01596300.01670600.056476.01847900.01611900.01023500.0-142030.01614100.01916700.02110100.0-60493.02045700.02207100.02097600.0
Percentage of WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

us-gaap:WeightedAverageNumberOfSharesIssuedBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value71682.9020526450450.13231345
Percentage of WeightedAverageNumberOfSharesIssuedBasic100.0100.0100.0100.0100.0100.0100.0100.0

rcus:AccruedResearchAndDevelopmentExpensesCurrent

rcus:AccruedResearchAndDevelopmentExpensesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value28231828136.7984.5725.805124.9542.8163.6042.0822.0511.193
Percentage of AccruedResearchAndDevelopmentExpensesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:CashCashEquivalentsAndAvailableForSaleInvestments

rcus:CashCashEquivalentsAndAvailableForSaleInvestments


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value805884735785462157188196224243259265277290175
Percentage of CashCashEquivalentsAndAvailableForSaleInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:ContingentMilestonePaymentsReceivable us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ContingentMilestonePaymentsReceivable

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contingent
Period End2020-07-13
Value400
Percentage of ContingentMilestonePaymentsReceivable100.0

rcus:ContractualObligationAdditionalPaymentDue us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ContractualObligationAdditionalPaymentDue

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contractual
Period End2020-07-13
Value100
Percentage of ContractualObligationAdditionalPaymentDue100.0

rcus:DeferredRevenueRelatedPartiesClassifiedCurrent

rcus:DeferredRevenueRelatedPartiesClassifiedCurrent


Deferred
Period End2021-06-302021-03-312020-12-312019-12-31
Value6767670.0
Percentage of DeferredRevenueRelatedPartiesClassifiedCurrent100.0100.0100.00.0

rcus:DeferredRevenueRelatedPartiesNoncurrent

rcus:DeferredRevenueRelatedPartiesNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312019-12-31
Value1021101170.0
Percentage of DeferredRevenueRelatedPartiesNoncurrent100.0100.0100.00.0

rcus:DeferredRevenueRelatedToResearchAndDevelopmentPipeline us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:DeferredRevenueRelatedToResearchAndDevelopmentPipeline

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Deferred
Period End2021-06-302021-03-312020-12-31
Value106114121
Percentage of DeferredRevenueRelatedToResearchAndDevelopmentPipeline100.0100.0100.0

rcus:DeferredTaxAssetsLeaseLiability

rcus:DeferredTaxAssetsLeaseLiability


Deferred
Period End2020-12-312019-12-31
Value9068000.06052000.0
Percentage of DeferredTaxAssetsLeaseLiability100.0100.0

rcus:DeferredTaxAssetsLeasingArrangements

rcus:DeferredTaxAssetsLeasingArrangements


Deferred
Period End2020-12-31
Value3831000.0
Percentage of DeferredTaxAssetsLeasingArrangements100.0

rcus:DeferredTaxLiabilitiesRightOfUseAssets

rcus:DeferredTaxLiabilitiesRightOfUseAssets


Deferred
Period End2020-12-31
Value2704000.0
Percentage of DeferredTaxLiabilitiesRightOfUseAssets100.0

rcus:FutureDevelopmentAndPromotionCostsContractLiability us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:FutureDevelopmentAndPromotionCostsContractLiability

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Future
Period End2021-06-302021-03-312020-12-312020-07-13
Value9700000.09700000.09700000.09200000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiability100.0100.0100.0100.0

rcus:FutureDevelopmentAndPromotionCostsContractLiability us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:GileadSciencesInc


Future
Period End2020-09-30
Value9200000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiability0.0

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityCurrent us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityCurrent

us-gaap:OtherCurrentLiabilities, rcus:GileadSciencesInc


Future
Period End2020-09-30
Value1900000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiabilityCurrent100.0

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityCurrent us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, us-gaap:OtherCurrentLiabilities, rcus:OptionLicenseAndCollaborationAgreement


Future
Period End2020-09-30
Value1900000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiabilityCurrent100.0

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent

us-gaap:OtherNoncurrentLiabilities, rcus:GileadSciencesInc


Future
Period End2020-09-30
Value7300000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent100.0

rcus:FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, us-gaap:OtherNoncurrentLiabilities, rcus:OptionLicenseAndCollaborationAgreement


Future
Period End2020-09-30
Value7300000.0
Percentage of FutureDevelopmentAndPromotionCostsContractLiabilityNoncurrent100.0

rcus:LesseeOperatingLeaseAllowanceForTenantImprovements

rcus:LesseeOperatingLeaseAllowanceForTenantImprovements


Lessee
Period End2020-12-312020-06-30
Value121.0
Percentage of LesseeOperatingLeaseAllowanceForTenantImprovements100.0100.0

rcus:LesseeOperatingLeaseAllowanceForTenantImprovements us-gaap:StatementGeographical, us-gaap:SubsequentEventType

stpr:CA, us-gaap:SubsequentEvent


Lessee
Period End2021-04-30
Value5.8
Percentage of LesseeOperatingLeaseAllowanceForTenantImprovements0.0

rcus:LesseeOperatingLeaseCollateralAmount us-gaap:StatementGeographical, us-gaap:SubsequentEventType

rcus:LesseeOperatingLeaseCollateralAmount

stpr:CA, us-gaap:SubsequentEvent


Lessee
Period End2021-04-30
Value1000000.0
Percentage of LesseeOperatingLeaseCollateralAmount100.0

rcus:LesseeOperatingLeaseLiabilityPaymentsDueThereafter

rcus:LesseeOperatingLeaseLiabilityPaymentsDueThereafter


Lessee
Period End2021-06-302020-12-31
Value424.311
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueThereafter100.0100.0

rcus:LesseeOperatingLeaseLiabilityPaymentsDueYearSix

rcus:LesseeOperatingLeaseLiabilityPaymentsDueYearSix


Lessee
Period End2020-12-31
Value3340000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearSix100.0

rcus:LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements

rcus:LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements


Lessee
Period End2020-12-31
Value5.5
Percentage of LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements100.0

rcus:LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements us-gaap:StatementGeographical, us-gaap:SubsequentEventType

stpr:CA, us-gaap:SubsequentEvent


Lessee
Period End2021-04-30
Value10
Percentage of LesseeOperatingLeaseOptionToIncreaseAllowanceForTenantImprovements0.0

rcus:LesseeOperatingLeaseTenantImprovementAllowanceReceivable

rcus:LesseeOperatingLeaseTenantImprovementAllowanceReceivable


Lessee
Period End2021-06-30
Value11
Percentage of LesseeOperatingLeaseTenantImprovementAllowanceReceivable100.0

rcus:OperatingLeaseLiabilityNetOfTenantImprovementAllowancesReceivable

rcus:OperatingLeaseLiabilityNetOfTenantImprovementAllowancesReceivable


Operating
Period End2021-06-30
Value40
Percentage of OperatingLeaseLiabilityNetOfTenantImprovementAllowancesReceivable100.0

rcus:OperatingLossCarryForwardsWithNoExpirationDate us-gaap:IncomeTaxAuthority

rcus:OperatingLossCarryForwardsWithNoExpirationDate

us-gaap:DomesticCountry


Operating
Period End2020-12-31
Value205
Percentage of OperatingLossCarryForwardsWithNoExpirationDate100.0

rcus:OtherAccruedLiabilities

rcus:OtherAccruedLiabilities


Other
Period End2021-06-302021-03-312020-12-312019-12-31
Value351000.0341000.0616000.0196000.0
Percentage of OtherAccruedLiabilities100.0100.0100.0100.0

rcus:PercentageOfOutstandingCommonStockOwned us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:PercentageOfOutstandingCommonStockOwned

rcus:GileadSciencesInc


Percentage
Period End2021-06-302021-03-312020-12-312020-09-30
Value19.419.513.013.0
Percentage of PercentageOfOutstandingCommonStockOwned100.0100.0100.0100.0

rcus:PresentValueOfResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:PresentValueOfResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Present
Period End2020-07-13
Value100
Percentage of PresentValueOfResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo100.0

rcus:RelatedPartiesContractLiabilitiesNoncurrent

rcus:RelatedPartiesContractLiabilitiesNoncurrent


Related
Period End2021-06-302021-03-312020-12-312019-12-31
Value9703000.09703000.09703000.00
Percentage of RelatedPartiesContractLiabilitiesNoncurrent100.0100.0100.00.0

rcus:ResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:ResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Research
Period End2020-07-13
Value100
Percentage of ResearchAndDevelopmentInformationAccessRightsPaymentRelatedToYearTwo100.0

rcus:TenantImprovementAllowanceExpectedToBeReceivedInLessThanOneYearNetOfCurrentPortionOfLeaseLiability

rcus:TenantImprovementAllowanceExpectedToBeReceivedInLessThanOneYearNetOfCurrentPortionOfLeaseLiability


Tenant
Period End2021-06-30
Value9140000.0
Percentage of TenantImprovementAllowanceExpectedToBeReceivedInLessThanOneYearNetOfCurrentPortionOfLeaseLiability100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312019-12-31
Value1324000.04924000.0943000.00
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0100.00.0

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedProfessionalFeesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value756000.067000.0295000.0632000.0437000.0323000.0183000.0281000.0268000.0519000.0211000.0116000.0100000.0616000.0706000.0
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

rcus:CorporateSecuritiesAndCommercialPaper, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value358310262195533467516091110117866252
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:USGovernmentAgencyObligations, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value257410389464657
Percentage of AssetsFairValueDisclosure9.5110.293.876.054.174.1109.8

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3103621461812736745646439455810418266
Percentage of AssetsFairValueDisclosure86.5116.855.892.8512.8194.767.0125.1107.243.540.649.6120.6292.0127.7

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-03-312020-12-312020-09-302020-06-30
Value5.002253414
Percentage of AssetsFairValueDisclosure1.69.517.928.1

us-gaap:USTreasurySecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value13520630137312174
Percentage of AssetsFairValueDisclosure37.866.5114.7191.2227.1110.2

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

rcus:CorporateSecuritiesAndCommercialPaper, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value358310262195533467516091110117866252
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rcus:USGovernmentAgencyObligations, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value257410389464657
Percentage of AssetsFairValueDisclosure9.5110.293.876.054.174.1109.8

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3103621461812736745646439455810418266
Percentage of AssetsFairValueDisclosure86.5116.855.892.8512.8194.767.0125.1107.243.540.649.6120.6292.0127.7

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-03-312020-12-312020-09-302020-06-30
Value5.002253414
Percentage of AssetsFairValueDisclosure1.69.517.928.1

us-gaap:USTreasurySecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value13520630137312174
Percentage of AssetsFairValueDisclosure37.866.5114.7191.2227.1110.2

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3103621461812736745646439455810418266
Percentage of AssetsFairValueDisclosure86.5116.855.892.8512.8194.767.0125.1107.243.540.649.6120.6292.0127.7

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value49452258860318990142132159203214207173108109
Percentage of AssetsFairValueDisclosure137.8168.1224.2309.1355.3261.9210.2256.4265.2221.0193.8176.0200.4174.1209.8

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value805884735785462157188196224243259265277290175
Percentage of AssetsFairValueDisclosure224.3284.8280.0401.9868.0456.6277.2381.5372.3264.5234.5225.6321.0466.1337.4

us-gaap:AvailableForSaleSecurities

us-gaap:AvailableForSaleSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value805884735785462157188196224243259265277290175
Percentage of AvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecurities us-gaap:InvestmentType

rcus:CorporateSecuritiesAndCommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value358310262195533467516091110117866252
Percentage of AvailableForSaleSecurities44.635.135.724.911.521.936.126.226.937.842.644.331.221.529.6

rcus:USGovernmentAgencyObligations


Available
Period End2020-12-312019-12-312018-12-31
Value2574103
Percentage of AvailableForSaleSecurities3.439.740.0

us-gaap:MoneyMarketFunds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3103621461812736745646439455810418266
Percentage of AvailableForSaleSecurities38.641.019.923.159.142.624.232.828.816.417.322.037.662.637.8

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value5.00225341410389464657
Percentage of AvailableForSaleSecurities0.63.44.53.240.033.716.815.932.5

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value13520630137312174
Percentage of AvailableForSaleSecurities16.923.341.047.626.239.7

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50000.056000.057000.087000.0151000.0315000.067000.054000.0111000.032000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType

rcus:CorporateSecuritiesAndCommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value39000.014000.015000.027000.030000.09000.055000.012000.027000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax78.025.026.331.019.92.982.122.224.3

rcus:USGovernmentAgencyObligations


Available
Period End2020-12-312019-12-31
Value4000.012000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax7.017.9

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-30
Value2000.04000.06000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.67.06.9

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value11000.040000.038000.054000.0121000.012000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax22.071.466.762.180.117.9

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value96000.058000.013000.06000.07000.027000.03000.03000.0108000.0110000.084000.097000.042000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType

rcus:CorporateSecuritiesAndCommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value57000.056000.012000.05000.06000.027000.02000.03000.091000.067000.060000.054000.012000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax59.496.692.383.385.7100.066.7100.084.360.971.455.728.6

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value39000.02000.01000.01000.01000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax40.63.47.716.733.3

us-gaap:AvailableForSaleSecuritiesAmortizedCost

us-gaap:AvailableForSaleSecuritiesAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value805884735785462157188196224243259265277290175
Percentage of AvailableForSaleSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAmortizedCost us-gaap:InvestmentType

rcus:CorporateSecuritiesAndCommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value358310262195533467516091110117866252
Percentage of AvailableForSaleSecuritiesAmortizedCost44.635.135.724.911.522.036.126.226.937.842.744.331.221.529.6

rcus:USGovernmentAgencyObligations


Available
Period End2020-12-312019-12-312018-12-31
Value2474103
Percentage of AvailableForSaleSecuritiesAmortizedCost3.439.740.0

us-gaap:MoneyMarketFunds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3103621461812736745646439455810418266
Percentage of AvailableForSaleSecuritiesAmortizedCost38.641.019.923.159.142.724.232.828.816.417.322.037.662.637.8

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value5.024341410389464657
Percentage of AvailableForSaleSecuritiesAmortizedCost0.63.44.53.240.033.716.915.932.5

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value13520630137312074
Percentage of AvailableForSaleSecuritiesAmortizedCost16.923.341.047.626.139.7

us-gaap:AvailableForSaleSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesCurrent


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value40043655556017790130111148173185182958277
Percentage of AvailableForSaleSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value84576.442.7
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesNoncurrent

us-gaap:AvailableForSaleSecuritiesNoncurrent


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-302019-03-312018-12-31
Value84576.442.75.9920.01.2013.181
Percentage of AvailableForSaleSecuritiesNoncurrent100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndCashEquivalentsFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3203901732212856757787668717416919898
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3233921732222856758797668717517019898
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:ContractWithCustomerAssetNet

rcus:GileadSciencesInc, rcus:OptionLicenseAndCollaborationAgreement


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value4000000.04100000.04200000.04300000.0
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerAssetNetCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1575000.05235000.01049000.02579000.0222000.0344000.0132000.05276000.00
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ContractWithCustomerAssetNetCurrent us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, us-gaap:PrepaidExpensesAndOtherCurrentAssets, rcus:OptionLicenseAndCollaborationAgreement


Contract
Period End2021-06-302021-03-312020-12-312020-07-13
Value1000000.01000000.01000000.02900000.0
Percentage of ContractWithCustomerAssetNetCurrent63.519.195.30.0

us-gaap:ContractWithCustomerAssetNetCurrent us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:GileadSciencesInc


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value1300000.04900000.0900000.02500000.0
Percentage of ContractWithCustomerAssetNetCurrent82.593.685.896.9

us-gaap:ContractWithCustomerAssetNetNoncurrent us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

us-gaap:ContractWithCustomerAssetNetNoncurrent

rcus:GileadSciencesInc, us-gaap:OtherNoncurrentAssets, rcus:OptionLicenseAndCollaborationAgreement


Contract
Period End2021-06-302021-03-312020-12-312020-07-13
Value3000000.03100000.03200000.01400000.0
Percentage of ContractWithCustomerAssetNetNoncurrent100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ContractWithCustomerLiability

rcus:GileadSciencesInc


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value170177185193
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value103113122918.5221012131012
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:TaihoPharmaceuticalCoLtd, rcus:OptionAndLicenseAgreement


Contract
Period End2020-12-312019-12-31
Value5.012
Percentage of ContractWithCustomerLiabilityNoncurrent4.199.8

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

rcus:GileadSciencesInc


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value10211011784
Percentage of ContractWithCustomerLiabilityNoncurrent98.597.195.992.6

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent us-gaap:PlanName

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

rcus:TwoThousandFifteenStockPlan


Deferred
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value700000.01700000.02000000.02300000.02600000.02800000.03100000.03500000.03800000.0900000.0
Percentage of DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-31
Value2704000.0
Percentage of DeferredIncomeTaxLiabilities100.0

us-gaap:DeferredOfferingCosts us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:DeferredOfferingCosts

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Deferred
Period End2020-07-13
Value1900000.0
Percentage of DeferredOfferingCosts100.0

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredRentCreditNoncurrent


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4311000.03439000.03590000.03734000.03875000.04010000.04145000.04272000.04396000.04516000.04655000.04740000.0
Percentage of DeferredRentCreditNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-31
Value2407000.03277000.03909000.0
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value86503018
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value54301611
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value5890000.02965000.01724000.01292000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value118.0775.0872.706
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8599000.07128000.08632000.06247000.03980000.02566000.04571000.03455000.02301000.01963000.02833000.02761000.01902000.0643000.01026000.0
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStockOption


Employee
Period End2020-12-31
Value88
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-12-31
Value88
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:CounterpartyName, us-gaap:SubsequentEventType

us-gaap:EquityMethodInvestmentOwnershipPercentage

rcus:GileadSciencesInc, us-gaap:SubsequentEvent


Equity
Period End2021-02-24
Value19.5
Percentage of EquityMethodInvestmentOwnershipPercentage100.0

us-gaap:InterestReceivableCurrent

us-gaap:InterestReceivableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1400000.01029000.0649000.0372000.0239000.0251000.0
Percentage of InterestReceivableCurrent100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsAndCash us-gaap:BalanceSheetLocation

us-gaap:InvestmentsAndCash

rcus:CashCashEquivalentsAndInvestmentsInMarketableSecurities


Investments
Period End2021-06-302021-03-312020-09-30
Value805884785
Percentage of InvestmentsAndCash100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-30
Value5722000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-30
Value2233000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:LineOfCredit

us-gaap:StandbyLettersOfCredit


Line
Period End2021-06-302021-03-31
Value3000000.02000000.0
Percentage of LineOfCredit100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302020-12-31
Value5.27.3
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

us-gaap:OperatingLeasesFutureMinimumPaymentsDue


Operating
Period End2020-12-312020-06-302019-12-31
Value901013
Percentage of OperatingLeasesFutureMinimumPaymentsDue100.0100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-312019-12-312018-12-31
Value25313770
Percentage of OperatingLossCarryforwards100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-31
Value151615
Percentage of OperatingLossCarryforwards6.312.321.7

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3005000.01988000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0203000.0
Percentage of RestrictedCashNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashNoncurrent us-gaap:CreditFacility

us-gaap:StandbyLettersOfCredit


Restricted
Period End2021-06-302021-03-31
Value3000000.02000000.0
Percentage of RestrictedCashNoncurrent99.8100.6

us-gaap:SecurityDeposit

us-gaap:SecurityDeposit


Security
Period End2021-06-302020-12-31
Value3000000.0200000.0
Percentage of SecurityDeposit100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU, rcus:TwoThousandEighteenEquityIncentivePlan


Share
Period End2020-12-31
Value27.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value10.28
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-31
Value122
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue


Share
Period End2020-12-31
Value122
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-31
Value13.88
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice100.0

us-gaap:SharePrice us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

us-gaap:SharePrice

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Share
Period End2020-07-13
Value33.54
Percentage of SharePrice100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value44
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:SharesIssuedPricePerShare us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SharesIssuedPricePerShare

rcus:GileadSciencesInc, us-gaap:SubsequentEvent, rcus:CommonStockPurchaseAgreement


Shares
Period End2020-07-13
Value33.54
Percentage of SharesIssuedPricePerShare100.0

us-gaap:SharesIssuedPricePerShare us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Shares
Period End2021-02-282021-01-312020-07-13
Value39.039.033.54
Percentage of SharesIssuedPricePerShare0.00.0100.0

us-gaap:SharesIssuedPricePerShare us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TypeOfArrangement

rcus:GileadSciencesInc, rcus:CommonStockPurchaseAgreement


Shares
Period End2021-02-28
Value39.0
Percentage of SharesIssuedPricePerShare0.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-31
Value9900000.06100000.03600000.0
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0

us-gaap:StateAndLocalJurisdiction, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-31
Value5100000.05000000.03100000.0
Percentage of TaxCreditCarryforwardAmount51.582.086.1

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:Revenues
us-gaap:CounterpartyName, us-gaap:ProductOrService
('rcus:GileadSciencesIncAndTaihoPharmaceuticalCo', None)
Revenuesus-gaap: Counterparty Name, us-gaap: Product Or Service
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components