CNST


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:DebtInstrument
us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

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:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:MarketableSecuritiesCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets

us-gaap:AccountsPayableCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

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:IncomeStatementLocation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType

us-gaap:DeferredTaxAssetsValuationAllowance

cnst:AmortizationAndAccretionOnMarketableSecurities
us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
cnst:CommissionPercentageOfGrossProceedsOfCommonStock
us-gaap:DebtInstrument
cnst:DebtInstrumentClosingFee

cnst:IncreaseDecreaseInOperatingLeaseRightOfUseAssets

cnst:PercentageIncreaseInBaseRentOfLease

cnst:SecuredLetterOfCreditAgainstFacilityLease

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount

us-gaap:DepreciationAndAmortization
us-gaap:DebtInstrument
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:InvestmentIncomeInterest

us-gaap:MarketableSecuritiesUnrealizedGainLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasesRentExpenseNet

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:PaidInKindInterest
us-gaap:DebtInstrument
us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromIssuanceInitialPublicOffering

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromStockOptionsExercised
us-gaap:ValuationTechnique
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:ValuationTechnique
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

cnst:AccruedExternalResearchAndDevelopmentExpenseCurrent

cnst:AccruedExternalResearchAndDevelopmentExpensesCurrent
us-gaap:DebtInstrument
cnst:DebtInstrumentRepaidAmount

cnst:DeferredTaxLiabilitiesRightOfUseAsset

cnst:LongTermDebtNetOfCurrentPortion
us-gaap:IncomeTaxAuthority
cnst:OperatingLossCarryforwardsNotSubjectToExpiration
us-gaap:IncomeTaxAuthority
cnst:OperatingLossCarryforwardsSubjectToExpiration

cnst:TaxCreditCarryforwardRestrictiveLimitationsAmount

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AreaOfLand

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:CashAndCashEquivalents
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:CashAndCashEquivalents
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent
us-gaap:CashAndCashEquivalents
us-gaap:FinancialInstrument
us-gaap:InvestmentType

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

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentUnamortizedDiscountCurrent

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:RestrictedCash
us-gaap:ShortTermDebtType

us-gaap:RestrictedCashNoncurrent

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:AwardType
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforwardAmount

Plots across concepts


Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Property Plant And Equipment Net
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
OperatingLeaseLiability
Operating Lease Liability Noncurrent
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount

Tables

  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:CommonStockValue ████▇▇▅▅▁▁0.0050.0050.0050.0050.0040.0040.0030.0030.00.0
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted ███▆▆▄▁47.83873847.61270347.53496442.58941541.76563535.08681725.829105NA1.199164NA
us-gaap:EarningsPerShareBasicAndDiluted ████████▄▁-0.84-0.79-0.71-0.7-0.61-0.69-0.82-0.77-9.96-17.64
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:ComprehensiveIncomeNetOfTax ▁▂▃▅▆▇██-40.077-37.515-33.897-29.408-25.528-24.215-21.159-19.944NANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument cnst:LoanAgreementNANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense █▇▆▆▄▄▃▃▁9.4428.5437.9356.965.9085.4714.814.0062.486NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▂▃▅▆▇█-40.072-37.384-33.776-29.729-25.429-24.184-21.149NANANA
us-gaap:IncomeTaxExpenseBenefit NA0.00.00.0240.015NANANANANA
us-gaap:IncomeTaxesPaid NA0.0NANANANANANANANA
us-gaap:InterestExpense NA0.2980.8570.8570.850.8570.6050.00.187NA
us-gaap:InterestPaidNet NA0.2280.6550.6560.6480.6030.4370.0NANA
us-gaap:NetIncomeLoss ▁▂▃▄▅▅▆▆██-40.072-37.384-33.776-29.753-25.444-24.208-21.149-19.944-11.941-11.932
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-40.072NA-33.776-29.753-25.444NA-21.149NA-11.941NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁▂▃▄▅▅▆▆█▇-40.072-37.384-33.776-29.753-25.444-24.215-21.149-19.944-11.941-16.98
us-gaap:NonoperatingIncomeExpense ▆▁▅▅█▅▅█▆▆0.154-1.485-0.398-0.1420.554-0.127-0.0980.6880.081-0.044
us-gaap:OperatingExpenses █▇▆▅▄▄▃▃▁▁40.22635.89933.37829.58725.98324.05721.05120.63212.02211.888
us-gaap:OperatingIncomeLoss ▁▂▃▄▅▅▆▆█-40.226-35.899-33.378-29.587-25.983-24.057-21.051-20.632-12.022NA
us-gaap:ProfitLoss ▁▂▃▅▆▇██-40.072-37.384-33.776-29.753-25.444-24.208-21.149-19.944NANA
us-gaap:ResearchAndDevelopmentExpense █▇▆▅▄▄▃▃▁30.78427.35625.44322.62720.07518.58616.24116.6269.536NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:Assets ▆▇██▆▆▂▂▂▁402.659441.854505.449534.798373.061399.13105.217118.93894.62219.103
us-gaap:Liabilities ▃▄██▇█▇▂▁▁25.3431.1362.67962.81757.53561.54657.06514.7810.00311.708
us-gaap:LiabilitiesAndStockholdersEquity ▆▇██▆▆▂▂▂▁402.659441.854505.449534.798373.061399.13105.217118.93894.62219.103
us-gaap:StockholdersEquity ▇▇██▆▇▄▄▁▁377.319410.724442.77471.981315.526337.58448.152104.158-188.215-165.833
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:AssetsCurrent ▆▇██▆▆▂▂▂▁389.948428.609494.466523.099361.666386.98992.21117.30390.60517.722
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▄▃▅▅█▂▃▃▁113.983163.693116.996179.112190.464334.33278.977114.59288.5416.404
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃▄▃▅▅█▂▃▃▁117.216166.926117.421179.537190.889334.75779.402115.01788.78216.646
us-gaap:MarketableSecuritiesCurrent ▆▆█▇▄▁268.097257.755372.358341.401168.38549.602NANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▇▅▂▃▃▃▂▂▁7.8687.1615.1122.5862.8173.0553.1442.7112.0651.318
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:PropertyPlantAndEquipmentGross NA8.322NANANA7.774NA8.451NA7.848
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType cnst:ComputerEquipmentAndSoftwareNA1.612NANANA1.567NA2.319NA1.874
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType cnst:LaboratoryEquipmentNA5.741NANANA5.411NA5.603NA5.468
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNA0.345NANANA0.33NA0.289NA0.289
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNA0.624NANANA0.466NA0.24NA0.217
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NA6.825NANANA6.803NA7.241NA6.727
us-gaap:PropertyPlantAndEquipmentNet █▇▆▆▁▂▃▄▁▃1.6671.4971.3951.4430.8670.9711.1491.210.8851.121
us-gaap:DeferredTaxAssetsLiabilitiesNet NA0.967NANANA2.935NANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▆▆▇▇█2.8113.5418.719.37810.10310.74511.372NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:AccountsPayableCurrent ▃█▄▄▂▅▃▄▁▁4.5199.8535.3715.6593.5587.2784.9835.7232.6792.799
us-gaap:LiabilitiesCurrent ▆██▇▄▅▄▃▁▂25.3430.54831.27427.28419.28522.75517.75414.669.41311.131
us-gaap:LongTermDebtCurrent NANA5.672.15NANANANA0.6054.103
us-gaap:OperatingLeaseLiabilityCurrent ▆█▄▃▂▁3.3653.6443.0432.9372.7472.562NANANANA
us-gaap:OtherLiabilitiesCurrent ▁▄▆█▆▇▆▄▂▂0.1750.3410.420.5290.4230.4970.4140.3460.220.225
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:LongTermDebtNoncurrent NANA24.08827.56929.68129.642NA0.0NA0.0
us-gaap:OtherLiabilitiesNoncurrent NANA0.8790.7160.5530.390.2270.0020.0030.006
us-gaap:OperatingLeaseLiabilityNoncurrent NA0.5826.4387.2488.0168.759NANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NA0.585NANANA3.881NANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:StockholdersEquity ▇▇██▆▇▄▄▁▁377.319410.724442.77471.981315.526337.58448.152104.158-188.215-165.833
us-gaap:CommonStockValue ████▇▇▅▅▁▁0.0050.0050.0050.0050.0040.0040.0030.0030.00.0
us-gaap:AdditionalPaidInCapitalCommonStock ████▆▆▄▄▁▁863.132856.46850.991846.305660.443656.973343.327337.9929.748.079
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▃▃▄▅▅▇▇█-485.816-445.744-408.36-374.584-344.831-319.387-295.179-233.837-197.955-173.912
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▃▆█▁▃-0.0020.0030.1340.255-0.09-0.006NANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 5.437NA4.2193.6352.559NA1.948NA0.687NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▃▃▆▅▇▇█-39.738-33.551-30.81-21.033-26.03-16.958-19.11-13.52NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅█▄▁▂▄▆▅-11.207114.168-31.773-172.547-118.749-39.48332.866-0.352NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▁▂▅▂█▂▂1.235-31.1120.467182.2280.911311.79610.178-0.011NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▃▄▂▃▁█▄▃-49.7149.505-62.116-11.352-143.868255.35523.934-13.883NANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:IncreaseDecreaseInAccountsPayable ▁█▅▆▂▆▄▆-5.3864.4790.2391.523-3.722.356-1.4241.27NANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▃▃▆▅▇▇█-39.738-33.551-30.81-21.033-26.03-16.958-19.11-13.52NANA
us-gaap:NetIncomeLoss ▁▂▃▄▅▅▆▆██-40.072-37.384-33.776-29.753-25.444-24.208-21.149-19.944-11.941-11.932
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-40.072NA-33.776-29.753-25.444NA-21.149NA-11.941NA
us-gaap:ProfitLoss ▁▂▃▅▆▇██-40.072-37.384-33.776-29.753-25.444-24.208-21.149-19.944NANA
us-gaap:ShareBasedCompensation █▆▆▅▄▃▃▂▁5.4374.3734.2193.6352.5591.8521.9481.4360.687NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅█▄▁▂▄▆▅-11.207114.168-31.773-172.547-118.749-39.48332.866-0.352NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▂█▂▁▁▃▅0.490.1390.6460.1230.0380.0160.2140.352NANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▁▂▅▂█▂▂1.235-31.1120.467182.2280.911311.79610.178-0.011NANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value5000.05000.05000.05000.04000.04000.03000.03000.000
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302017-06-30
Value474747424135252525191.1991640.961431
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.84-0.79-0.71-0.7-0.61-0.69-0.82-0.8-0.75-0.77-0.81-9.96-12.44-17.64-15.18-12.81-10.41
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-40077000.0-37515000.0-33897000.0-29408000.0-25528000.0-24215000.0-21159000.0-20765000.0-19417000.0-19944000.0-15938000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

us-gaap:GainsLossesOnExtinguishmentOfDebt

cnst:LoanAgreement


Gains
Period End2020-11-03
Value-1500000.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.0
Percentage of Revenues0.0
Percentage of Revenues cnst:LoanAgreement0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value9.4428.5437.9356.965.9085.4714.814.8864.4294.0063.682.4861.49
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-40072000.0-37384000.0-33776000.0-29729000.0-25429000.0-24184000.0-21149000.0-20767000.0-19426000.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2020-12-312020-09-302020-06-302020-03-31
Value0024000.015000.0
Percentage of IncomeTaxExpenseBenefit0.00.0100.0100.0
Percentage of Revenues0.00.00.00.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2020-12-31
Value0
Percentage of IncomeTaxesPaid0.0
Percentage of Revenues0.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value298000.0857000.0857000.0850000.0857000.0605000.0578000.075000.007000.0187000.0255000.0
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value228000.0655000.0656000.0648000.0603000.0437000.0026000.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-40072000.0-37384000.0-33776000.0-29753000.0-25444000.0-24208000.0-21149000.0-20767000.0-19426000.0-19944000.0-15938000.0-11941000.0-12102000.0-11932000.0-9782000.0-7992000.0-5671000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-40072000.0-33776000.0-29753000.0-25444000.0-21149000.0-20767000.0-19426000.0-15938000.0-11941000.0-12102000.0
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

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-40072000.0-37384000.0-33776000.0-29753000.0-25444000.0-24215000.0-21149000.0-20765000.0-19417000.0-19944000.0-15938000.0-11941000.0-12102000.0-16980000.0-14600000.0-12319000.0-9868000.0
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value154000.0-1485000.0-398000.0-142000.0554000.0-127000.0-98000.074000.0680000.0688000.0475000.081000.075000.0-44000.0-111000.01520000.02346000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value40353329252421202020161212119.6719.5128.017
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value-40226000.0-35899000.0-33378000.0-29587000.0-25983000.0-24057000.0-21051000.0-20841000.0-20106000.0-20632000.0-16413000.0-12022000.0-9512000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-40072000.0-37384000.0-33776000.0-29753000.0-25444000.0-24208000.0-21149000.0-20767000.0-19426000.0-19944000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value30272522201816151516129.5368.022
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value4024415055343733991051189419
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value25316262576157141011
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.37.012.411.715.415.454.212.410.661.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value4024415055343733991051189419
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value377410442471315337486786104122-188.215-177.057-165.833-131.671
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets93.793.087.688.384.684.645.80.00.087.60.0-198.90.0-868.10.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.0020.0030.1340.255-0.09-0.0060.0010.0110.009
Percentage of StockholdersEquity-0.00.00.00.1-0.0-0.00.00.00.0
Percentage of Assets-0.00.00.00.0-0.0-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value8638568508466606563433413393373369.748.9578.0796.864
Percentage of StockholdersEquity228.8208.5192.2179.3209.3194.6713.0507.9394.2324.5274.5-5.2-5.1-4.9-5.2
Percentage of Assets214.4193.8168.4158.2177.0164.6326.30.00.0284.20.010.30.042.30.0
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0050.0050.0050.0050.0040.0040.0030.0030.0030.0030.003
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-485.816-445.744-408.36-374.584-344.831-319.387-295.179-274.03-253.263-233.837-213.893-197.955-186.014-173.912-138.535
Percentage of StockholdersEquity-128.8-108.5-92.2-79.4-109.3-94.6-613.0-407.9-294.2-224.5-174.5105.2105.1104.9105.2
Percentage of Assets-120.7-100.9-80.8-70.0-92.4-80.0-280.50.00.0-196.60.0-209.20.0-910.40.0
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value389428494523361386921179017
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets96.897.097.897.896.997.087.698.695.892.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value113163116179190334781148816
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.337.023.133.551.183.875.196.393.685.9

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-06-302016-12-312015-12-31
Value1171661171791903347955521151288816133751
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.137.823.233.651.283.975.50.00.096.70.093.887.10.00.00.0

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value26825737234116849
Percentage of MarketableSecuritiesCurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets66.658.373.763.845.112.4

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value7868000.07161000.05112000.02586000.02817000.03055000.03144000.02711000.02065000.01318000.0
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.01.61.00.50.80.83.02.32.26.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value8322000.07774000.08451000.07848000.0
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0
Percentage of Assets1.91.97.141.1

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

cnst:ComputerEquipmentAndSoftware


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1612000.01567000.02319000.01874000.0
Percentage of PropertyPlantAndEquipmentGross19.420.227.423.9
Percentage of Assets0.40.41.99.8
Percentage of Assets cnst:ComputerEquipmentAndSoftware0.00.00.00.0

cnst:LaboratoryEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value5741000.05411000.05603000.05468000.0
Percentage of PropertyPlantAndEquipmentGross69.069.666.369.7
Percentage of Assets1.31.44.728.6
Percentage of Assets cnst:LaboratoryEquipment0.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value345000.0330000.0289000.0289000.0
Percentage of PropertyPlantAndEquipmentGross4.14.23.43.7
Percentage of Assets0.10.10.21.5
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value624000.0466000.0240000.0217000.0
Percentage of PropertyPlantAndEquipmentGross7.56.02.82.8
Percentage of Assets0.10.10.21.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value6825000.06803000.07241000.06727000.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0
Percentage of Assets1.51.76.135.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value1667000.01497000.01395000.01443000.0867000.0971000.01149000.01210000.0885000.01121000.0
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.30.30.20.21.11.00.95.9

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-31
Value967000.02935000.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0
Percentage of Assets0.20.7

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-01-01
Value2.8113.5418.719.3781010113.1
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.81.71.82.72.710.80.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-03-312020-12-312020-09-30
Value5000000.04974000.0453000.0
Percentage of OtherAssets100.0100.0100.0
Percentage of Assets1.21.10.1

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value4519000.09853000.05371000.05659000.03558000.07278000.04983000.05723000.02679000.02799000.0
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.12.21.11.11.01.84.74.82.814.7

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value25303127192217149.41311
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.36.96.25.15.25.716.912.39.958.3

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2020-09-302020-06-302018-06-302017-12-31
Value5670000.02150000.0605000.04103000.0
Percentage of LongTermDebtCurrent100.0100.0100.0100.0
Percentage of Assets1.10.40.621.5

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3365000.03644000.03043000.02937000.02747000.02562000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.60.50.70.6

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value175000.0341000.0420000.0529000.0423000.0497000.0414000.0346000.0220000.0225000.0
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.10.10.10.40.30.21.2

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value242729290.00.0
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.00.00.0
Percentage of Assets4.85.28.07.40.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value879000.0716000.0553000.0390000.0227000.02000.03000.06000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.10.10.10.20.00.00.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value582000.06438000.07248000.08016000.08759000.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets0.11.31.42.12.2

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-312019-12-31
Value585000.03881000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets0.11.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-01-01
Value4.22611113.5
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets1.02.811.30.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-12-31
Value4.46513
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets1.03.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-312019-12-31
Value239000.02182000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.10.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value377410442471315337486786104122-188.215-177.057-165.833-131.671
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets93.793.087.688.384.684.645.80.00.087.60.0-198.90.0-868.10.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.0020.0030.1340.255-0.09-0.0060.0010.0110.009
Percentage of StockholdersEquity-0.00.00.00.1-0.0-0.00.00.00.0
Percentage of Assets-0.00.00.00.0-0.0-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value8638568508466606563433413393373369.748.9578.0796.864
Percentage of StockholdersEquity228.8208.5192.2179.3209.3194.6713.0507.9394.2324.5274.5-5.2-5.1-4.9-5.2
Percentage of Assets214.4193.8168.4158.2177.0164.6326.30.00.0284.20.010.30.042.30.0
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0050.0050.0050.0050.0040.0040.0030.0030.0030.0030.003
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-485.816-445.744-408.36-374.584-344.831-319.387-295.179-274.03-253.263-233.837-213.893-197.955-186.014-173.912-138.535
Percentage of StockholdersEquity-128.8-108.5-92.2-79.4-109.3-94.6-613.0-407.9-294.2-224.5-174.5105.2105.1104.9105.2
Percentage of Assets-120.7-100.9-80.8-70.0-92.4-80.0-280.50.00.0-196.60.0-209.20.0-910.40.0
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value5000.05000.05000.05000.04000.04000.03000.03000.000
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value8638568508466606563433379.748.079
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets214.4193.8168.4158.2177.0164.6326.3284.210.342.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value-485820000.0-445740000.0-408360000.0-374580000.0-344830000.0-319390000.0-295180000.0-233840000.0-197960000.0-173910000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-120.7-100.9-80.8-70.0-92.4-80.0-280.5-196.6-209.2-910.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-2000.03000.0134000.0255000.0-90000.0-6000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.00.00.00.0-0.0-0.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5.4374.2193.6352.5591.9481.7971.3131.2440.6870.585
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 End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5.4374.2193.6352.5591.9481.7971.3131.2440.6870.585
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-39738000.0-33551000.0-30810000.0-21033000.0-26030000.0-16958000.0-19110000.0-17847000.0-18333000.0-13520000.0-12854000.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-11.207114-31.773-172.547-118.749-39.4833220-63.357-0.352-0.082
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.235-31.1120.4671820.911311100.07819-0.01153
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-49.7149-62.116-11.352-143.868255232.596-62.145-13.88340
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-5386000.04479000.0239000.01523000.0-3720000.02356000.0-1424000.0-967000.01768000.01270000.01932000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-39738000.0-33551000.0-30810000.0-21033000.0-26030000.0-16958000.0-19110000.0-17847000.0-18333000.0-13520000.0-12854000.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-40072000.0-37384000.0-33776000.0-29753000.0-25444000.0-24208000.0-21149000.0-20767000.0-19426000.0-19944000.0-15938000.0-11941000.0-12102000.0-11932000.0-9782000.0-7992000.0-5671000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-40072000.0-33776000.0-29753000.0-25444000.0-21149000.0-20767000.0-19426000.0-15938000.0-11941000.0-12102000.0
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 End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-40072000.0-37384000.0-33776000.0-29753000.0-25444000.0-24208000.0-21149000.0-20767000.0-19426000.0-19944000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value5.4374.3734.2193.6352.5591.8521.9481.7971.3131.4361.2440.6870.138
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value3.172-0.5012.5582.2331.5531.1491.2041.0650.7890.8360.6780.3960.025
Percentage of ShareBasedCompensation58.3-11.560.661.460.762.061.859.360.158.254.557.618.1

us-gaap:ResearchAndDevelopmentExpense


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value2.2654.8741.6611.4021.0060.7030.7440.7320.5240.60.5660.2910.113
Percentage of ShareBasedCompensation41.7111.539.438.639.338.038.240.739.941.845.542.481.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-11.207114-31.773-172.547-118.749-39.4833220-63.357-0.352-0.082
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value490000.0139000.0646000.0123000.038000.016000.0214000.0235000.0234000.0352000.082000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.235-31.1120.4671820.911311100.07819-0.01153
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value16.688.957.785.51
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value20.9716.6816.1715.2513.78.958.077.78
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice0.0100.00.00.00.0100.00.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value150105745559
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0

cnst:AmortizationAndAccretionOnMarketableSecurities

cnst:AmortizationAndAccretionOnMarketableSecurities


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value370000.0177000.049000.0-218000.0-156000.0-53000.0-122000.0-311000.0-212000.0
Percentage of AmortizationAndAccretionOnMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0

cnst:CommissionPercentageOfGrossProceedsOfCommonStock us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

cnst:CommissionPercentageOfGrossProceedsOfCommonStock

us-gaap:CommonStock, cnst:AtMarketOffering


Commission
Period End2021-03-312020-12-31
Value3.00
Percentage of CommissionPercentageOfGrossProceedsOfCommonStock100.00.0

cnst:DebtInstrumentClosingFee us-gaap:DebtInstrument

cnst:DebtInstrumentClosingFee

cnst:LoanAgreement


Debt
Period End2020-11-032019-03-20
Value1900000.0300000.0
Percentage of DebtInstrumentClosingFee100.0100.0

cnst:IncreaseDecreaseInOperatingLeaseRightOfUseAssets

cnst:IncreaseDecreaseInOperatingLeaseRightOfUseAssets


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value824000.01666000.0668000.0725000.0642000.0924000.0923000.0771000.0690000.0
Percentage of IncreaseDecreaseInOperatingLeaseRightOfUseAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

cnst:PercentageIncreaseInBaseRentOfLease

cnst:PercentageIncreaseInBaseRentOfLease


Percentage
Period End2021-03-31
Value3.0
Percentage of PercentageIncreaseInBaseRentOfLease100.0

cnst:SecuredLetterOfCreditAgainstFacilityLease

cnst:SecuredLetterOfCreditAgainstFacilityLease


Secured
Period End2021-03-31
Value2800000.0
Percentage of SecuredLetterOfCreditAgainstFacilityLease100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value106000.0173000.0-527000.0573000.05000.020000.0-175000.0216000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value300000.0100000.0100000.0100000.0200000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0
Percentage of DefinedContributionPlanEmployerDiscretionaryContributionAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value202000.0210000.0167000.0120000.0147000.0194000.0200000.0196000.0168000.0147000.0142000.0
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrument

us-gaap:ExtinguishmentOfDebtAmount

cnst:LoanAgreement


Extinguishment
Period End2020-11-03
Value32
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2020-12-312020-09-302020-06-30
Value12000.0029000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.00.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value575000.0-309000.0652000.03563000.060000.02526000.01782000.01985000.0-2116000.02785000.01266000.0
Percentage of IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2021-03-312020-12-31
Value26000.04521000.0
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value707000.02049000.02526000.0-231000.0-238000.0-89000.0578000.0-129000.0-128000.0-826000.01472000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value154000.0302000.0459000.0686000.01404000.0730000.0507000.0652000.0755000.0688000.0482000.0268000.032000.0
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesUnrealizedGainLoss

us-gaap:MarketableSecuritiesUnrealizedGainLoss


Marketable
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-5000.0-121000.0345000.0-84000.0-10000.02000.09000.0
Percentage of MarketableSecuritiesUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesUnrealizedGainLoss us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Marketable
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-5000.0-121000.0345000.0-84000.0-10000.02000.09000.0
Percentage of MarketableSecuritiesUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value955000.01752000.0704000.0578000.0558000.0839000.0838000.0820000.0664000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesRentExpenseNet

us-gaap:OperatingLeasesRentExpenseNet


Operating
Period End2021-03-312019-09-302018-12-312018-09-302018-06-302017-06-30
Value5600000.0800000.0600000.0600000.0600000.0600000.0
Percentage of OperatingLeasesRentExpenseNet100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-5000.0-131000.0-121000.0345000.0-84000.0-7000.0-10000.02000.09000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-5000.0-131000.0-121000.0345000.0-84000.0-7000.0-10000.02000.09000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaidInKindInterest

us-gaap:PaidInKindInterest


Paid
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value70000.0202000.0201000.0202000.0201000.0148000.0140000.018000.000
Percentage of PaidInKindInterest100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:PaymentsOfDebtExtinguishmentCosts us-gaap:DebtInstrument

us-gaap:PaymentsOfDebtExtinguishmentCosts

cnst:LoanAgreement


Payments
Period End2020-11-03
Value300000.0
Percentage of PaymentsOfDebtExtinguishmentCosts100.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value12395111238135491.9950.063
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromIssuanceInitialPublicOffering

us-gaap:ProceedsFromIssuanceInitialPublicOffering


Proceeds
Period End2020-12-312020-09-302020-06-192019-12-132019-12-102019-12-31
Value0.00.0180241241306
Percentage of ProceedsFromIssuanceInitialPublicOffering0.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1122108065161035
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2020-12-31
Value12000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1235000.01049000.0467000.01501000.0911000.04913000.034000.077000.021000.0103000.031000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:ValuationTechnique

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:ValuationTechniqueOptionPricingModel


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value76.22-0.4378.630.84780.8217-0.00030.82220.83080.82130.0010.8114
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:ValuationTechnique

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:ValuationTechniqueOptionPricingModel


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.74-0.070.360.00470.0146-0.00060.01580.02060.02490.00020.0276
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Share
Period End2021-03-31
Value22.76
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-03-31
Value8.0
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-03-31
Value10.76
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-09-30
Value34.49-2.42
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value1235000.0467000.01501000.0911000.034000.077000.021000.031000.096000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value1235000.0467000.01501000.0911000.034000.077000.021000.031000.096000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0

cnst:AccruedExternalResearchAndDevelopmentExpenseCurrent

cnst:AccruedExternalResearchAndDevelopmentExpenseCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value14101212107.707
Percentage of AccruedExternalResearchAndDevelopmentExpenseCurrent100.0100.0100.0100.0100.0100.0

cnst:AccruedExternalResearchAndDevelopmentExpensesCurrent

cnst:AccruedExternalResearchAndDevelopmentExpensesCurrent


Accrued
Period End2020-12-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value107.7076.9285.613.0561.347
Percentage of AccruedExternalResearchAndDevelopmentExpensesCurrent100.0100.0100.0100.0100.0100.0

cnst:DebtInstrumentRepaidAmount us-gaap:DebtInstrument

cnst:DebtInstrumentRepaidAmount

cnst:LoanAgreement


Debt
Period End2020-11-03
Value30
Percentage of DebtInstrumentRepaidAmount100.0

cnst:DeferredTaxLiabilitiesRightOfUseAsset

cnst:DeferredTaxLiabilitiesRightOfUseAsset


Deferred
Period End2020-12-312019-12-31
Value967000.02935000.0
Percentage of DeferredTaxLiabilitiesRightOfUseAsset100.0100.0

cnst:LongTermDebtNetOfCurrentPortion

cnst:LongTermDebtNetOfCurrentPortion


Long
Period End2020-09-302020-06-302020-03-312019-12-31
Value24273030
Percentage of LongTermDebtNetOfCurrentPortion100.0100.0100.0100.0

cnst:OperatingLossCarryforwardsNotSubjectToExpiration us-gaap:IncomeTaxAuthority

cnst:OperatingLossCarryforwardsNotSubjectToExpiration

us-gaap:DomesticCountry


Operating
Period End2020-12-31
Value271
Percentage of OperatingLossCarryforwardsNotSubjectToExpiration100.0

cnst:OperatingLossCarryforwardsSubjectToExpiration us-gaap:IncomeTaxAuthority

cnst:OperatingLossCarryforwardsSubjectToExpiration

us-gaap:DomesticCountry


Operating
Period End2020-12-31
Value168
Percentage of OperatingLossCarryforwardsSubjectToExpiration100.0

cnst:TaxCreditCarryforwardRestrictiveLimitationsAmount

cnst:TaxCreditCarryforwardRestrictiveLimitationsAmount


Tax
Period End2020-12-31
Value100000.0
Percentage of TaxCreditCarryforwardRestrictiveLimitationsAmount100.0

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedEmployeeBenefitsCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value2278000.05545000.04153000.02868000.01636000.04527000.02782000.02726000.01395000.01867000.0
Percentage of AccruedEmployeeBenefitsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesAndOtherLiabilities


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value171717161212108.9376.1294.229
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedProfessionalFeesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value532000.0467000.0396000.0425000.0295000.0184000.0265000.0255000.0868000.0233000.0
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfLand

us-gaap:AreaOfLand


Area
Period End2021-03-312020-12-312020-11-302020-09-302019-12-312019-09-302019-02-28
Value47546.047546.079155.047546.036309.036309.011237.0
Percentage of AreaOfLand100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2020-09-302020-06-302020-03-312019-09-30
Value135000.0262000.0191000.01000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:CorporateDebtSecurities


Available
Period End2020-12-312020-09-302020-06-302019-09-30
Value6000.084000.0176000.01000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.062.267.2100.0

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value17000.06000.051000.086000.0191000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.037.832.8100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType

cnst:MarketableSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value17000.012000.0135000.0262000.0191000.01000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2020-09-302020-06-302020-03-312019-12-31
Value1000.07000.0281000.06000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:CorporateDebtSecurities


Available
Period End2021-03-312020-12-312020-06-302020-03-312019-12-31
Value19000.04000.03000.0281000.05000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.042.9100.083.3

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2020-12-312020-09-302020-06-302019-12-31
Value5000.01000.04000.01000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.0100.057.116.7

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType

cnst:MarketableSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value19000.09000.01000.07000.0281000.06000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value48952035838389
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:CashAndCashEquivalents

us-gaap:MoneyMarketFunds


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value11617918530378
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis23.934.451.779.088.7

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value12699607195268.091
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.012.413.726.57.09.1

us-gaap:CorporateDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4652714443121.997
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.014.68.612.03.32.2

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value951052392243010
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.049.043.28.42.6

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:InvestmentType

cnst:MarketableSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2682573723411684910
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.076.165.646.912.911.3

us-gaap:CashAndCashEquivalents


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value11617919033478
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis23.934.453.187.188.7

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2682573723411684910
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:CashAndCashEquivalents

us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value12699607195268.091
Percentage of AvailableForSaleSecuritiesDebtSecurities47.138.716.420.956.654.080.2

us-gaap:USGovernmentCorporationsAndAgenciesSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value951052402243010
Percentage of AvailableForSaleSecuritiesDebtSecurities35.640.964.565.917.920.3

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CommercialPaper, us-gaap:FairValueInputsLevel2


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value12699607195268.091
Percentage of AvailableForSaleSecuritiesDebtSecurities47.138.716.420.956.654.080.2

us-gaap:USGovernmentCorporationsAndAgenciesSecurities, us-gaap:FairValueInputsLevel2


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value951052402243010
Percentage of AvailableForSaleSecuritiesDebtSecurities35.640.964.565.917.920.3

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByAssetClass

us-gaap:CorporateDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4652714542121.998
Percentage of AvailableForSaleSecuritiesDebtSecurities17.320.419.213.225.525.719.8

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CorporateDebtSecurities, us-gaap:FairValueInputsLevel2


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4652714542121.998
Percentage of AvailableForSaleSecuritiesDebtSecurities17.320.419.213.225.525.719.8

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2682573723411684910
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value48952035838389
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:CashAndCashEquivalents

us-gaap:MoneyMarketFunds


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value11617918530378
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent23.934.451.779.088.7

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FinancialInstrument

us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value12699607195268.091
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent0.00.012.413.726.57.09.1

us-gaap:CorporateDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4652714542121.998
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent0.00.014.68.712.03.32.2

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value951052402243010
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent0.00.049.043.28.42.6

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:InvestmentType

cnst:MarketableSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2682573723411684910
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent0.00.076.165.646.912.911.3

us-gaap:CashAndCashEquivalents


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value11617919033478
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent23.934.453.187.188.7

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndCashEquivalentsFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value11316311617919033478
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByAssetClass

us-gaap:MoneyMarketFunds


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value113163116179185303781148816
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.097.490.7100.00.00.00.0

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

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value113163116179185303781148816
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.097.490.7100.00.00.00.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value11316311617918530378
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.097.490.7100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302017-12-31
Value30303030304.116
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountCurrent

us-gaap:DebtInstrumentUnamortizedDiscountCurrent


Debt
Period End2020-09-30
Value146000.0
Percentage of DebtInstrumentUnamortizedDiscountCurrent100.0

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent


Debt
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value96000.0128000.0319000.0358000.000
Percentage of DebtInstrumentUnamortizedDiscountNoncurrent100.0100.0100.0100.00.00.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-31
Value967000.02935000.0
Percentage of DeferredIncomeTaxLiabilities100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1511087455
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value120866145
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value6998000.06154000.01593000.0637000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value94000.073000.039000.040000.0
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2315119.137
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2021-03-312020-12-312020-09-30
Value704143
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-312019-12-31
Value3880000.03592000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value440317224
Percentage of OperatingLossCarryforwards100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-31
Value439315221
Percentage of OperatingLossCarryforwards99.899.398.7

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3233000.03233000.0425000.0425000.0425000.0425000.0425000.0425000.0
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCash us-gaap:ShortTermDebtType

us-gaap:LetterOfCredit


Restricted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3200000.03200000.0400000.0400000.0400000.0400000.0400000.0
Percentage of RestrictedCash99.099.094.194.194.194.194.1

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


Restricted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-06-302017-12-31
Value3233000.03233000.0425000.0425000.0425000.0425000.0425000.0425000.0242000.0242000.0
Percentage of RestrictedCashNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value10.69
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-09-30
Value11.569.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice0.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value741600.111.296
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value50744382921601.5750.11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue0.0100.00.00.00.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value16.68
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-09-30
Value20.9716.17
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice0.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue


Share
Period End2020-12-31
Value74
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-09-30
Value5043
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue0.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value41
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:EmployeeStockOption


Sharebased
Period End2021-03-312020-09-30
Value3122
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue10.00.0

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

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry, cnst:OrphanDrug


Tax
Period End2020-12-31
Value4.7
Percentage of TaxCreditCarryforwardAmount100.0

us-gaap:DomesticCountry, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-31
Value14128.8
Percentage of TaxCreditCarryforwardAmount314.90.00.0

us-gaap:StateAndLocalJurisdiction, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-31
Value5.54.43.5
Percentage of TaxCreditCarryforwardAmount117.00.00.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
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
us-gaap:ShareBasedCompensation
us-gaap:IncomeStatementLocation
(None,)
Share Based Compensationus-gaap: Income Statement Location