IGMS


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasicAndDiluted
us-gaap:IncomeStatementLocation, us-gaap:PlanName
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:PlanName
us-gaap:TitleOfIndividual, us-gaap:AwardType

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:GeneralAndAdministrativeExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:ProfitLoss

us-gaap:ResearchAndDevelopmentExpense

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:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

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:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

igms:AccruedShareBasedCompensationExpense
us-gaap:SubsequentEventType
igms:BaseRent

igms:IncreaseDecreaseInOperatingLeaseLiabilities
us-gaap:PlanName, us-gaap:SubsequentEventType
igms:IncreaseInCommonStockCapitalSharesReservedForFutureIssuance
us-gaap:SubsidiarySaleOfStock
igms:IssuanceCostsIncludedInAccountsPayable
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
igms:LicenseExpenses
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:TypeOfArrangement
igms:LicenseFee

igms:NonCashLeaseExpense
us-gaap:SubsequentEventType
igms:PercentageOfAnnualIncreaseInBaseRent

igms:StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts
us-gaap:StatementEquityComponents

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:Depreciation

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:SubsidiarySaleOfStock
us-gaap:PaymentsOfStockIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt
us-gaap:SubsidiarySaleOfStock
us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromStockOptionsExercised
us-gaap:TitleOfIndividual, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:SubsidiarySaleOfStock
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:SubsidiarySaleOfStock
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:PlanName, us-gaap:Vesting
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
us-gaap:PlanName
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:VariableLeaseCost
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

igms:AccruedPropertyPlantAndEquipmentCurrent

igms:AccruedResearchAndDevelopmentMaterialsAndServicesCurrent
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
igms:AdditionalMilestonePayment
us-gaap:FairValueByMeasurementFrequency
igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashAfterOneYearFairValue
us-gaap:FairValueByMeasurementFrequency
igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashBeforeOneYearFairValue
us-gaap:FairValueByMeasurementFrequency
igms:AvailableForSaleSecuritiesDebtSecuritiesAndCash
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
igms:CashAndCashEquivalentsAmortizedCostBasis

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCostBasis

igms:CashAndCashEquivalentsAndAvailableForSaleSecuritiesDebtSecuritiesFairValue
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:TypeOfArrangement
igms:LicenseAgreementPotentialMilestonePayments
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement
igms:LicenseAgreementUpfrontPaymentsPayable

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedProfessionalFeesCurrent
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:InvestmentsAndCash

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

Plots across concepts


Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
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 Accrued Liabilities Current
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Property Plant And Equipment
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:CommonStockValue ███████▁0.2560.2550.2550.2420.2410.240.240.004
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted █▁33.37175333.328994NA30.55173630.49146330.478984.2222590.438074
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA3.611734NANA2.997758NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities igms:EstimatedSharesIssuableUnderEmployeeStockPurchasePlanNA0.007848NANA0.019915NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOptionNA3.603469NANA2.939499NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSUNA0.000417NANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted ▁█-1.16-0.95NA-0.62-0.58-0.49-2.41-20.67
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation,us-gaap:PlanName us-gaap:GeneralAndAdministrativeExpense,igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan▁█2.9643.639NA0.9080.6570.2080.2180.094
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation,us-gaap:PlanName us-gaap:ResearchAndDevelopmentExpense,igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan█▁2.6451.865NA1.0470.6660.1920.1160.025
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan█▁5.6095.504NA1.9551.3230.40.3340.119
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual,us-gaap:AwardType srt:Director,us-gaap:RestrictedStockUnitsRSU▁█0.00.1NANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▁█-38.73-31.656NA-18.748-17.462-14.801-10.143-9.053
us-gaap:GeneralAndAdministrativeExpense █▁8.6498.134NA4.3883.993.1742.3941.232
us-gaap:NetIncomeLoss ▁█-38.714-31.644NA-18.839-17.624-14.815-10.172-9.053
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-38.714-31.644NA-18.839-17.624NA-10.172NA
us-gaap:NonoperatingIncomeExpense ▁█0.0240.062NA0.5680.9491.1220.501-0.007
us-gaap:OperatingExpenses █▁38.73831.706NA19.40718.57315.93710.6739.046
us-gaap:OperatingIncomeLoss ▁█-38.738-31.706NA-19.407-18.573-15.937-10.673-9.046
us-gaap:ProfitLoss ▁█-38.714-31.644NA-18.839-17.624-14.815-10.172-9.053
us-gaap:ResearchAndDevelopmentExpense █▁30.08923.572NA15.01914.58312.7638.2797.814
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:Assets ▇██▅▅▅▆▁350.664380.474408.632229.057243.15261.35269.8563.979
us-gaap:Liabilities █▇▇▆▅▅▃▁28.20824.86426.81722.10419.13921.11915.2348.89
us-gaap:LiabilitiesAndStockholdersEquity ▇██▅▅▅▆▁350.664380.474408.632229.057243.15261.35269.8563.979
us-gaap:StockholdersEquity ▇██▅▆▆▆▁322.456355.61381.815206.953224.011240.231254.622-65.828
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:AssetsCurrent ▆▇█▅▅▅▆▁290.161341.177373.272201.165212.506231.1248.1152.407
us-gaap:CashAndCashEquivalentsAtCarryingValue ███▂▂▂▆▁246.049252.376241.0831.79148.05535.891193.6791.887
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▇█▆▃▅▆▅▁8.7169.5037.0033.0755.7376.4316.0050.485
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:PropertyPlantAndEquipmentGross █▇▇▃▂▂▁▁31.73528.61525.51511.4576.1695.1463.6682.139
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▅▄▃▃▂▂▁4.3752.9622.2891.7291.4861.2641.0830.667
us-gaap:PropertyPlantAndEquipmentNet ██▇▃▂▂▁▁27.3625.65323.2269.7284.6833.8822.5851.472
us-gaap:OperatingLeaseRightOfUseAsset ▄▆▄▆▇█▁11.92312.75811.58612.87213.50814.1379.882NA
us-gaap:OtherAssetsNoncurrent ▇█▄▁▁▁0.8310.8860.5480.2580.2580.258NANA
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:AccountsPayableCurrent ▅▆█▅▃▄▃▁4.8535.6617.9244.2641.9843.0872.7780.164
us-gaap:AccruedLiabilitiesCurrent █▄▅▃▂▂▁▂10.7135.8266.6494.3333.0313.3052.0823.582
us-gaap:LiabilitiesCurrent █▆▇▄▂▂▁▂19.06214.81817.2411.1727.5448.8756.4248.89
us-gaap:OperatingLeaseLiabilityCurrent █▇▂▂▁▁3.4963.3312.6672.5752.5292.483NANA
us-gaap:OtherAccruedLiabilitiesCurrent ▄▂▂▁▁▁▃█0.2160.0670.0520.0090.0090.0090.1610.447
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▃▂▅▇█9.14610.0469.57710.93211.59512.244NANA
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:StockholdersEquity ▇██▅▆▆▆▁322.456355.61381.815206.953224.011240.231254.622-65.828
us-gaap:CommonStockValue ███████▁0.2560.2550.2550.2420.2410.240.240.004
us-gaap:AdditionalPaidInCapitalCommonStock ███▅▅▅▅▁581.056575.481570.03350.019348.33347.089346.6790.751
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▄▅▆▆▇█-258.918-220.204-188.56-143.668-124.829-107.205-92.39-64.072
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▂█▆▂-0.0020.0140.0260.2960.2050.043NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁5.6095.504NA1.9241.22NA0.334NA
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▁-26.352-28.262NA-13.077-16.387-12.067-15.38-6.193
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁█20.05839.611NA-2.95328.529-143.727-58.363-0.357
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁-0.033-0.053NA-0.2340.022-1.994224.655.241
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁█-6.32711.296NA-16.26412.164-157.788150.907-1.309
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:IncreaseDecreaseInAccountsPayable ▁█-0.361.045NA0.478-1.3831.306-0.7660.131
us-gaap:NetCashProvidedByUsedInOperatingActivities █▁-26.352-28.262NA-13.077-16.387-12.067-15.38-6.193
us-gaap:NetIncomeLoss ▁█-38.714-31.644NA-18.839-17.624-14.815-10.172-9.053
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-38.714-31.644NA-18.839-17.624NA-10.172NA
us-gaap:ProfitLoss ▁█-38.714-31.644NA-18.839-17.624-14.815-10.172-9.053
us-gaap:ShareBasedCompensation █▁5.6095.504NA1.9551.3230.40.3340.119
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁█20.05839.611NA-2.95328.529-143.727-58.363-0.357
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁█3.1626.073NA2.5241.7050.60.5890.357
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁-0.033-0.053NA-0.2340.022-1.994224.655.241
  2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value256000.0255000.0255000.0242000.0241000.0240000.0240000.04000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.1

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value33333030304.2222590.5596710.4431180.4380740.4380740.4380740.438074
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value3.6117342.99775811
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

igms:EstimatedSharesIssuableUnderEmployeeStockPurchasePlan


Antidilutive
Period End2021-03-312020-03-31
Value0.0078480.019915
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.20.7

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value3.6034692.9394992.102514
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount99.898.117.9

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-03-31
Value0.000417
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.16-0.95-0.62-0.58-0.49-2.41-19.08-16.86-20.67-14.88-9.62-6.68
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation, us-gaap:PlanName

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:GeneralAndAdministrativeExpense, igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.9643.6390.9080.6570.2080.2180.0320.0340.0940.012
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:GeneralAndAdministrativeExpense igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan0.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense, igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.6451.8651.0470.6660.1920.1160.1090.1050.0250.009
Percentage of AllocatedShareBasedCompensationExpense89.251.3115.3101.492.353.2340.6308.826.675.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:ResearchAndDevelopmentExpense igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan0.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.6095.5041.9551.3230.40.3340.1410.1390.1190.021
Percentage of AllocatedShareBasedCompensationExpense189.2151.3215.3201.4192.3153.2440.6408.8126.6175.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan0.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual, us-gaap:AwardType

srt:Director, us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2021-06-302021-03-31
Value0.00.1
Percentage of AllocatedShareBasedCompensationExpense0.02.7
Percentage of Revenues0.00.0
Percentage of Revenues srt:Director us-gaap:RestrictedStockUnitsRSU0.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-38730000.0-31656000.0-18748000.0-17462000.0-14801000.0-10143000.0-10676000.0-7470000.0-9053000.0-6517000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8.6498.1344.3883.993.1742.3942.2281.4451.2321.3730.7940.43
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-14815000.0-10172000.0-10676000.0-7470000.0-9053000.0-6517000.0-4215000.0-2926000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-10172000.0-10676000.0-7470000.0-6517000.0-4215000.0-2926000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value24000.062000.0568000.0949000.01122000.0501000.0-145000.0-113000.0-7000.028000.029000.030000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value383119181510107.3579.0466.5454.2442.956
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-38738000.0-31706000.0-19407000.0-18573000.0-15937000.0-10673000.0-10531000.0-7357000.0-9046000.0-6545000.0-4244000.0-2956000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-14815000.0-10172000.0-10676000.0-7470000.0-9053000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value30231514128.2798.3035.9127.8145.1723.452.526
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value3503804082292432612693.979
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value282426221921158.89
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.06.56.69.67.98.15.6223.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value3503804082292432612693.979
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value322355381206224240254-80.969-73.126-65.828-42.001-43.724-43.379-40.503-29.703
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets92.093.593.490.492.191.994.40.00.0-1654.40.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-30
Value-0.0020.0140.0260.2960.2050.0430.029
Percentage of StockholdersEquity-0.00.00.00.10.10.00.0
Percentage of Assets-0.00.00.00.10.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value5815755703503483473461.2430.9230.7511.9833635350.6
Percentage of StockholdersEquity180.2161.8149.3169.1155.5144.5136.2-1.5-1.3-1.1-4.7-83.2-82.8-87.6-2.0
Percentage of Assets165.7151.3139.5152.8143.3132.8128.50.00.018.90.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.2560.2550.2550.2420.2410.240.240.0060.0040.0040.0040.0040.0040.0040.004
Percentage of StockholdersEquity0.10.10.10.10.10.10.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets0.10.10.10.10.10.10.10.00.00.10.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-258.918-220.204-188.56-143.668-124.829-107.205-92.39-82.218-71.542-64.072-55.019-48.502-44.287-41.361-30.307
Percentage of StockholdersEquity-80.3-61.9-49.4-69.4-55.7-44.6-36.3101.597.897.3131.0110.9102.1102.1102.0
Percentage of Assets-73.8-57.9-46.1-62.7-51.3-41.0-34.20.00.0-1610.30.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value2903413732012122312482.407
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets82.789.791.387.887.488.491.960.5

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value246252241314835193422.861.8873.1960.432
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.266.359.013.919.813.771.80.00.047.40.00.0

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value8716000.09503000.07003000.03075000.05737000.06431000.06005000.0485000.0
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.51.71.32.42.52.212.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value312825116.1695.1463.6682.139
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.07.56.25.02.52.01.453.8

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

igms:LaboratoryEquipment


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value128.5057.1254.8954.7963.83.1271.987
Percentage of PropertyPlantAndEquipmentGross40.629.727.942.777.773.885.392.9
Percentage of Assets3.72.21.72.12.01.51.249.9
Percentage of Assets igms:LaboratoryEquipment0.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-30
Value4.6966.865176.3161.1331.1180.32
Percentage of PropertyPlantAndEquipmentGross14.824.070.355.118.421.78.7
Percentage of Assets1.31.84.42.80.50.40.1
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value13120.2530.0960.090.0780.0710.025
Percentage of PropertyPlantAndEquipmentGross43.145.11.00.81.51.51.91.2
Percentage of Assets3.93.40.10.00.00.00.00.6
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.0

us-gaap:OfficeEquipment


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.4880.3320.2120.150.150.150.150.127
Percentage of PropertyPlantAndEquipmentGross1.51.20.81.32.42.94.15.9
Percentage of Assets0.10.10.10.10.10.10.13.2
Percentage of Assets us-gaap:OfficeEquipment0.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value4375000.02962000.02289000.01729000.01486000.01264000.01083000.0667000.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.20.80.60.80.60.50.416.8

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value2725239.7284.6833.8822.5851.472
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.86.75.74.21.91.51.037.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-01-01
Value1112111213149.8820.6
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.42.85.65.65.43.70.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value831000.0886000.0548000.0258000.0258000.0258000.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.10.10.10.1

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value4853000.05661000.07924000.04264000.01984000.03087000.02778000.0164000.0
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.51.91.90.81.21.04.1

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value105.8266.6494.3333.0313.3052.0823.582
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.11.51.61.91.21.30.890.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value191417117.5448.8756.4248.89
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.43.94.24.93.13.42.4223.4

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-01-01
Value3496000.03331000.02667000.02575000.02529000.02483000.0708000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.90.71.11.01.00.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value216000.067000.052000.09000.09000.09000.0161000.0447000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.00.111.2

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value9.146109.577101112
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.62.34.84.84.7

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312019-09-302019-01-01
Value1213100.7
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets3.63.53.80.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-31
Value1314
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets3.83.8

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-31
Value843000.0961000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.20.3

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value322355381206224240254-80.969-73.126-65.828-42.001-43.724-43.379-40.503-29.703
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets92.093.593.490.492.191.994.40.00.0-1654.40.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-30
Value-0.0020.0140.0260.2960.2050.0430.029
Percentage of StockholdersEquity-0.00.00.00.10.10.00.0
Percentage of Assets-0.00.00.00.10.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value5815755703503483473461.2430.9230.7511.9833635350.6
Percentage of StockholdersEquity180.2161.8149.3169.1155.5144.5136.2-1.5-1.3-1.1-4.7-83.2-82.8-87.6-2.0
Percentage of Assets165.7151.3139.5152.8143.3132.8128.50.00.018.90.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.2560.2550.2550.2420.2410.240.240.0060.0040.0040.0040.0040.0040.0040.004
Percentage of StockholdersEquity0.10.10.10.10.10.10.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets0.10.10.10.10.10.10.10.00.00.10.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-258.918-220.204-188.56-143.668-124.829-107.205-92.39-82.218-71.542-64.072-55.019-48.502-44.287-41.361-30.307
Percentage of StockholdersEquity-80.3-61.9-49.4-69.4-55.7-44.6-36.3101.597.897.3131.0110.9102.1102.1102.0
Percentage of Assets-73.8-57.9-46.1-62.7-51.3-41.0-34.20.00.0-1610.30.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value256000.0255000.0255000.0242000.0241000.0240000.0240000.04000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.1

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value5815755703503483473460.751
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets165.7151.3139.5152.8143.3132.8128.518.9

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value-258920000.0-220200000.0-188560000.0-143670000.0-124830000.0-107200000.0-92390000.0-64072000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-73.8-57.9-46.1-62.7-51.3-41.0-34.2-1610.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value-2000.014000.026000.0296000.0205000.043000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.00.00.00.10.10.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5609000.05504000.01924000.01220000.0334000.0141000.0139000.020000.022000.022000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5609000.05504000.01924000.01220000.0334000.0141000.0139000.020000.022000.022000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-26352000.0-28262000.0-13077000.0-16387000.0-12067000.0-15380000.0-9324000.0-8345000.0-6193000.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2039-2.95328-143.727-58.363-0.433-0.715-0.357
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-0.033-0.053-0.2340.022-1.99422449105.241
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-6.32711-16.26412-157.788150390.973-1.309
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-360000.01045000.0478000.0-1383000.01306000.0-766000.0-400000.01821000.0131000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-26352000.0-28262000.0-13077000.0-16387000.0-12067000.0-15380000.0-9324000.0-8345000.0-6193000.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-14815000.0-10172000.0-10676000.0-7470000.0-9053000.0-6517000.0-4215000.0-2926000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-10172000.0-10676000.0-7470000.0-6517000.0-4215000.0-2926000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-38714000.0-31644000.0-18839000.0-17624000.0-14815000.0-10172000.0-10676000.0-7470000.0-9053000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5.6095.5041.9551.3230.40.3340.1410.1390.119
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2039-2.95328-143.727-58.363-0.433-0.715-0.357
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3162000.06073000.02524000.01705000.0600000.0589000.0433000.0715000.0357000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-0.033-0.053-0.2340.022-1.99422449105.241
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312018-12-31
Value31.1830.4715.5413.9511.753.361.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0

igms:AccruedShareBasedCompensationExpense

igms:AccruedShareBasedCompensationExpense


Accrued
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value00100000.0100000.000
Percentage of AccruedShareBasedCompensationExpense0.00.0100.0100.00.00.0

igms:BaseRent us-gaap:SubsequentEventType

igms:BaseRent

us-gaap:SubsequentEvent


Base
Period End2021-07-01
Value204670.0
Percentage of BaseRent100.0

igms:IncreaseDecreaseInOperatingLeaseLiabilities

igms:IncreaseDecreaseInOperatingLeaseLiabilities


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value-735000.0-711000.0-617000.0-603000.0-285000.0-226000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities100.0100.0100.0100.0100.0100.0

igms:IncreaseInCommonStockCapitalSharesReservedForFutureIssuance us-gaap:PlanName, us-gaap:SubsequentEventType

igms:IncreaseInCommonStockCapitalSharesReservedForFutureIssuance

igms:TwoThousandEighteenOmnibusIncentivePlan, us-gaap:SubsequentEvent


Increase
Period End2020-07-30
Value257250.0
Percentage of IncreaseInCommonStockCapitalSharesReservedForFutureIssuance100.0

igms:TwoThousandNineteenEmployeeStockPurchasePlan, us-gaap:SubsequentEvent


Increase
Period End2020-07-30
Value64312.0
Percentage of IncreaseInCommonStockCapitalSharesReservedForFutureIssuance25.0

igms:IssuanceCostsIncludedInAccountsPayable us-gaap:SubsidiarySaleOfStock

igms:IssuanceCostsIncludedInAccountsPayable

igms:PublicOffering


Issuance
Period End2021-03-31
Value269000.0
Percentage of IssuanceCostsIncludedInAccountsPayable100.0

igms:LicenseExpenses us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

igms:LicenseExpenses

igms:AbCelleraBiologicsInc, us-gaap:ResearchAndDevelopmentExpense, igms:StrategicResearchAndLicenseAgreement


License
Period End2021-06-30
Value100000.0
Percentage of LicenseExpenses100.0

igms:AblexisInc, us-gaap:ResearchAndDevelopmentExpense, igms:LicenseAgreement


License
Period End2021-06-302021-03-31
Value300000.0100000.0
Percentage of LicenseExpenses300.00.0

igms:AdimabLLC, us-gaap:ResearchAndDevelopmentExpense, igms:OptionAndLicenseAgreement


License
Period End2021-06-302021-03-312020-06-302020-03-31
Value0500000.0100000.00
Percentage of LicenseExpenses0.00.00.00.0

igms:AvantGenInc, us-gaap:ResearchAndDevelopmentExpense, igms:PatentAndMaterialsLicenseAgreement


License
Period End2021-06-30
Value400000.0
Percentage of LicenseExpenses400.0

igms:MedivirAB, us-gaap:ResearchAndDevelopmentExpense, igms:LicenseAgreement


License
Period End2021-06-302021-03-31
Value100000.01000000.0
Percentage of LicenseExpenses100.00.0

igms:UniversityOfTexas, us-gaap:ResearchAndDevelopmentExpense, igms:PatentAndMaterialsLicenseAgreement


License
Period End2021-06-30
Value100000.0
Percentage of LicenseExpenses100.0

igms:LicenseFee us-gaap:CounterpartyName, us-gaap:Range, us-gaap:TypeOfArrangement

igms:LicenseFee

igms:AvantGenInc, srt:Maximum, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-12-31
Value300000.0
Percentage of LicenseFee100.0

igms:UniversityOfTexas, srt:Maximum, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-10-31
Value100000.0
Percentage of LicenseFee0.0

igms:NonCashLeaseExpense

igms:NonCashLeaseExpense


Non
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value835000.0672000.0636000.0629000.0445000.0180000.0
Percentage of NonCashLeaseExpense100.0100.0100.0100.0100.0100.0

igms:PercentageOfAnnualIncreaseInBaseRent us-gaap:SubsequentEventType

igms:PercentageOfAnnualIncreaseInBaseRent

us-gaap:SubsequentEvent


Percentage
Period End2021-07-01
Value3.0
Percentage of PercentageOfAnnualIncreaseInBaseRent100.0

igms:StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts

igms:StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value-438000.0-53000.0-551000.022000.0
Percentage of StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts100.0100.0100.0100.0

igms:StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value-439000.0-53000.0-552000.021000.0
Percentage of StockIssuedDuringPeriodValueExerciseOfStockOptionsNetOfSharesWithheldForTaxesAndExerciseCosts100.2100.0100.295.5

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-06-302020-03-31
Value-137000.0-195000.052000.0306000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value-42000.0856000.02764000.0280000.0316000.018000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1400000.0673000.0200000.0222000.0181000.0200000.0100000.0114000.087000.0100000.0
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4481000.0-1158000.0309000.0585000.01352000.0-272000.0925000.0-2030000.02336000.0
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-31
Value-55000.0338000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-927000.02500000.0-2810000.0-735000.077000.04582000.0-236000.0989000.0-186000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value955000.0786000.0767000.0767000.0523000.0171000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value853000.0761000.0750000.0740000.0350000.0216000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-30
Value-16000.0-12000.091000.0162000.014000.029000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-06-302020-03-312019-09-30
Value-16000.0-12000.091000.0162000.029000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:SubsidiarySaleOfStock

us-gaap:PaymentsOfStockIssuanceCosts

igms:UnderwrittenPublicOffering


Payments
Period End2020-12-11
Value14
Percentage of PaymentsOfStockIssuanceCosts100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-31
Value597000.0418000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-06-302020-03-31
Value35128641
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromIssuanceOfCommonStock

igms:UnderwrittenPublicOffering


Proceeds
Period End2020-12-11
Value215
Percentage of ProceedsFromIssuanceOfCommonStock100.0

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value55588571
Percentage of ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value159000.0365000.017000.022000.0154000.010000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:TitleOfIndividual, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

igms:Consultant, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-31
Value31.7950.22
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0

srt:Director, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-06-30
Value3.2576.6951.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue10.2152.70.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value89.488.70.8650.83400.79400.793
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.0100.0100.00.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:SubsidiarySaleOfStock

us-gaap:EmployeeStock


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-30
Value68.173.61.0010.74300.743
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate76.283.0115.789.10.093.6

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.10.80.0050.01200.01600.025
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate100.0100.0100.0100.00.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:SubsidiarySaleOfStock

us-gaap:EmployeeStock


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-30
Value0.040.10.0020.01900.019
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate3.612.540.0158.30.0118.7

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50.9665.241.128.10.58.801.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value-1.419.1
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value-4.3357.15
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value-2.1889.76
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:PlanName, us-gaap:Vesting

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

igms:TwoThousandEighteenOmnibusIncentivePlan, us-gaap:ShareBasedCompensationAwardTrancheOne


Sharebased
Period End2021-06-302021-03-31
Value025.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent us-gaap:PlanName

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent

igms:TwoThousandNineteenEmployeeStockPurchasePlan


Sharebased
Period End2021-06-302021-03-31
Value085.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent0.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302020-06-30
Value405000.0317000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-06-30
Value405000.0317000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-06-302020-03-31
Value66000.071000.068000.046000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonStock


Entity
Period End2020-07-312020-05-012020-03-162019-11-01
Value24242424
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

igms:AccruedPropertyPlantAndEquipmentCurrent

igms:AccruedPropertyPlantAndEquipmentCurrent


Accrued
Period End2021-06-30
Value661000.0
Percentage of AccruedPropertyPlantAndEquipmentCurrent100.0

igms:AccruedResearchAndDevelopmentMaterialsAndServicesCurrent

igms:AccruedResearchAndDevelopmentMaterialsAndServicesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value4864000.02754000.01509000.01652000.01194000.0906000.0376000.02395000.0
Percentage of AccruedResearchAndDevelopmentMaterialsAndServicesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

igms:AdditionalMilestonePayment us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

igms:AdditionalMilestonePayment

igms:MedivirAB, igms:LicenseAgreement


Additional
Period End2021-01-31
Value1.5
Percentage of AdditionalMilestonePayment100.0

igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashAfterOneYearFairValue us-gaap:FairValueByMeasurementFrequency

igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashAfterOneYearFairValue

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-30
Value20
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAndCashAfterOneYearFairValue100.0

igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashBeforeOneYearFairValue us-gaap:FairValueByMeasurementFrequency

igms:AvailableForSaleSecuritiesDebtMaturitiesAndCashBeforeOneYearFairValue

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-31
Value279330364
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAndCashBeforeOneYearFairValue100.0100.0100.0

igms:AvailableForSaleSecuritiesDebtSecuritiesAndCash us-gaap:FairValueByMeasurementFrequency

igms:AvailableForSaleSecuritiesDebtSecuritiesAndCash

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-31
Value300330364
Percentage of AvailableForSaleSecuritiesDebtSecuritiesAndCash100.0100.0100.0

igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax

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Cash
Period End2020-12-31
Value1000.0
Percentage of CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax100.0

igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

igms:CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax

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Cash
Period End2020-12-31
Value1000.0
Percentage of CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax100.0

igms:CashAndCashEquivalentsAmortizedCostBasis us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

igms:CashAndCashEquivalentsAmortizedCostBasis

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Cash
Period End2021-06-302021-03-312020-12-31
Value237239135
Percentage of CashAndCashEquivalentsAmortizedCostBasis100.0100.0100.0

igms:FinancialAssetsIncludedWithinCashAndCashEquivalents, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Cash
Period End2020-12-31
Value73
Percentage of CashAndCashEquivalentsAmortizedCostBasis54.3

igms:FinancialAssetsIncludedWithinCashAndCashEquivalents, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Cash
Period End2021-06-302021-03-31
Value6.9994.999
Percentage of CashAndCashEquivalentsAmortizedCostBasis3.02.1

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


Cash
Period End2021-03-312020-12-31
Value7.030
Percentage of CashAndCashEquivalentsAmortizedCostBasis2.922.8

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Cash
Period End2021-06-302021-03-312020-12-31
Value1000.015000.027000.0
Percentage of CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Cash
Period End2021-06-302021-03-312020-12-31
Value3000.01000.01000.0
Percentage of CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCostBasis

igms:CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCostBasis


Cash
Period End2021-06-302021-03-312020-12-31
Value300330364
Percentage of CashAndCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0

igms:CashAndCashEquivalentsAndAvailableForSaleSecuritiesDebtSecuritiesFairValue

igms:CashAndCashEquivalentsAndAvailableForSaleSecuritiesDebtSecuritiesFairValue


Cash
Period End2021-06-302021-03-312020-12-31
Value300330364
Percentage of CashAndCashEquivalentsAndAvailableForSaleSecuritiesDebtSecuritiesFairValue100.0100.0100.0

igms:LicenseAgreementPotentialMilestonePayments us-gaap:CounterpartyName, us-gaap:Range, us-gaap:TypeOfArrangement

igms:LicenseAgreementPotentialMilestonePayments

igms:AvantGenInc, srt:Maximum, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-12-31
Value8.4
Percentage of LicenseAgreementPotentialMilestonePayments100.0

igms:MedivirAB, srt:Maximum, igms:LicenseAgreement


License
Period End2021-01-31
Value350
Percentage of LicenseAgreementPotentialMilestonePayments0.0

igms:UniversityOfTexas, srt:Maximum, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-10-31
Value2.8
Percentage of LicenseAgreementPotentialMilestonePayments0.0

igms:LicenseAgreementUpfrontPaymentsPayable us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

igms:LicenseAgreementUpfrontPaymentsPayable

igms:AvantGenInc, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-12-31
Value200000.0
Percentage of LicenseAgreementUpfrontPaymentsPayable100.0

igms:MedivirAB, igms:LicenseAgreement


License
Period End2021-01-31
Value1000000.0
Percentage of LicenseAgreementUpfrontPaymentsPayable0.0

igms:UniversityOfTexas, igms:PatentAndMaterialsLicenseAgreement


License
Period End2020-10-31
Value100000.0
Percentage of LicenseAgreementUpfrontPaymentsPayable0.0

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedEmployeeBenefitsCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value3835000.02907000.04925000.02227000.01391000.02030000.01319000.0177000.0
Percentage of AccruedEmployeeBenefitsCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedProfessionalFeesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value1137000.098000.0163000.0445000.0437000.0360000.0226000.0563000.0
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

igms:FinancialAssetsIncludedWithinLongTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-30
Value1000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-31
Value7000.02000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2020-12-31
Value1000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.0

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


Available
Period End2021-03-312020-12-31
Value8000.023000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

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Available
Period End2021-06-30
Value2000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-03-31
Value1000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.0

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Available
Period End2021-06-30
Value1000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax50.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

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Available
Period End2021-06-30
Value20
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-31
Value9.5825771
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis47.00.00.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-31
Value14152.997
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis73.50.00.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302020-12-31
Value5.0776.876
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis24.90.0

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


Available
Period End2021-06-302021-03-312020-12-31
Value5.7465.54943
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis28.20.00.0

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Available
Period End2021-06-30
Value20
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-31
Value9.5825771
Percentage of AvailableForSaleSecuritiesDebtSecurities47.00.00.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-31
Value14152.997
Percentage of AvailableForSaleSecuritiesDebtSecurities73.50.00.0

igms:FinancialAssetsIncludedWithinShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302020-12-31
Value5.0766.877
Percentage of AvailableForSaleSecuritiesDebtSecurities24.90.0

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


Available
Period End2021-06-302021-03-312020-12-31
Value5.7465.55743
Percentage of AvailableForSaleSecuritiesDebtSecurities28.20.00.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent


Available
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value3579125166158188
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent


Available
Period End2021-06-302020-06-302020-03-312019-12-31
Value205.0341211
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:CashAndCashEquivalentsFairValueDisclosure

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


Cash
Period End2021-06-302021-03-312020-12-31
Value237239135
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0

igms:FinancialAssetsIncludedWithinCashAndCashEquivalents, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Cash
Period End2020-12-31
Value73
Percentage of CashAndCashEquivalentsFairValueDisclosure54.3

igms:FinancialAssetsIncludedWithinCashAndCashEquivalents, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Cash
Period End2021-06-302021-03-31
Value6.9994.999
Percentage of CashAndCashEquivalentsFairValueDisclosure3.02.1

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


Cash
Period End2021-03-312020-12-31
Value7.030
Percentage of CashAndCashEquivalentsFairValueDisclosure2.922.8

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value246252241314835193422.961.9873.2960.4823.156
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsAndCash

us-gaap:InvestmentsAndCash


Investments
Period End2021-06-302021-03-31
Value301331
Percentage of InvestmentsAndCash100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-31
Value1935000.02788000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value3.63.63.80.0380.0380.038
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value12.339.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0

Line plots across dimensions of each concept


us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amountus-gaap: Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation, us-gaap:PlanName
(None, 'igms:TwoThousandTenStockPlanTwoThousandEighteenStockPlanAndEmployeeStockPurchasePlan')
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location, us-gaap: Plan Name
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