APLS

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

Plots across concepts

IncomeStatement

Balance Sheet

Assets

Current Assets

NonCurrent Assets

Liabilities

Current Liabilities

Stockholders Equity

CashFlow

NetCashProvidedByUsedInOperatingActivities

NetCashProvidedByUsedInInvestingActivities

OperatingLeaseLiability

LesseeOperatingLeaseLiabilityPaymentsDue

Tables

		2021-06-30	2020-12-31	2020-09-30
us-gaap:CommonStockValue	▄▄▄	0.008	0.008	0.008
us-gaap:CommonStockSharesIssued		NA	76.13	NA
us-gaap:CommonStockSharesOutstanding		NA	76.13	NA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted	▄	80.654	NA	0.075628
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	▄	23.974	NA	25.784
us-gaap:EarningsPerShareBasic		NA	1.03	-1.79
us-gaap:EarningsPerShareDiluted		NA	0.93	-1.79
us-gaap:EarningsPerShareBasicAndDiluted	▁█▃	-2.72	1.0600000000000005	-1.79

		2021-06-30	2020-12-31	2020-09-30

		2021-06-30	2020-12-31	2020-09-30

		2021-06-30	2020-12-31	2020-09-30
us-gaap:ComprehensiveIncomeNetOfTax	▁█▃	-219.4	79.907	-137.788
us-gaap:GeneralAndAdministrativeExpense	█▅▁	48.967	44.492	36.991
us-gaap:InterestExpense us-gaap:AdjustmentsForNewAccountingPronouncements apls:AccountingStandardsUpdate202006		NA	NA	NA
us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType apls:ConvertibleSeniorNotesDueTwoThousandTwentySix	▁██	3.8	9.6	9.5
us-gaap:InterestPaidNet	▁▁█	0.0	0.0	9.1
us-gaap:NetIncomeLoss	▁█▃	-219.191	78.265	-135.7
us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings	▄	-219.191	NA	-135.7
us-gaap:OperatingExpenses	█▁▂	194.91	119.879	130.198
us-gaap:OperatingIncomeLoss	▁█▂	-194.287	130.12	-129.552
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	▄█▁	-0.174	1.772	-1.658
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome	▄	-0.174	NA	-1.658
us-gaap:OtherComprehensiveIncomeLossNetOfTax	▄	-0.209	NA	-2.088
us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	▄	-0.035	NA	-0.43
us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment	▄	-0.174	NA	-1.658
us-gaap:OtherNonoperatingIncomeExpense	▇▁█	-0.061	-0.505	-0.016
us-gaap:ProfitLoss	▁█▃	-219.191	78.265	-135.7
us-gaap:ResearchAndDevelopmentExpense	█▁█	95.943	50.337	93.207
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax	▁█▁	0.623	250.0	0.646

		2021-06-30	2020-12-31	2020-09-30

		2021-06-30	2020-12-31	2020-09-30
us-gaap:Assets	▁█▃	699.912	960.569	768.334
us-gaap:Liabilities	█▅▁	841.405	756.012	662.494
us-gaap:LiabilitiesAndStockholdersEquity	▁█▃	699.912	960.569	768.334
us-gaap:StockholdersEquity	▁█▆	-141.493	204.557	105.84
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption srt:CumulativeEffectPeriodOfAdoptionAdjustment		NA	-149.734	NA
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:AdditionalPaidInCapital		NA	-165.747	NA
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:RetainedEarnings		NA	16.013	NA
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	▃▁█	0.036	-0.008	0.122
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome	▁█▁	-1.829	-0.117	-1.759
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment	▁█▁	-1.865	-0.109	-1.881
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital	█▃▁	1173.512	1131.013	1112.203
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock	▄▄▄	0.008	0.008	0.008
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings	▁█▇	-1313.184	-926.347	-1004.612

		2021-06-30	2020-12-31	2020-09-30
us-gaap:AssetsCurrent	▁█▃	655.126	917.192	742.349
us-gaap:CashAndCashEquivalentsAtCarryingValue	▁█▄	270.764	565.779	415.56
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	▁█▄	272.336	567.045	416.815
us-gaap:MarketableSecuritiesCurrent	█▁▁	328.246	311.869	312.598
us-gaap:AccountsReceivableNetCurrent	▄	0.719	NA	NA
us-gaap:InventoryNet	▄	3.731	NA	NA
us-gaap:InventoryRawMaterialsAndSupplies	▄	3.7	NA	NA
us-gaap:OtherAssetsCurrent	█▇▁	31.228	26.878	1.637

		2021-06-30	2020-12-31	2020-09-30
us-gaap:PropertyPlantAndEquipmentNet	▇█▁	6.75	6.803	6.531
us-gaap:OperatingLeaseRightOfUseAsset	█▁▂	21.939	17.719	18.545
us-gaap:OtherAssetsNoncurrent	▇█▁	16.097	18.855	0.909

		2021-06-30	2020-12-31	2020-09-30
us-gaap:AccountsPayableCurrent	▁▅█	5.339	8.477	11.069
us-gaap:AccruedLiabilitiesCurrent	█▆▁	134.303	111.935	60.766
us-gaap:LiabilitiesCurrent	█▆▁	157.787	128.327	75.273
us-gaap:OperatingLeaseLiabilityCurrent	█▄▁	4.035	3.685	3.438
us-gaap:OtherAccruedLiabilitiesCurrent	█▄▁	26.692	16.11	8.086

		2021-06-30	2020-12-31	2020-09-30
us-gaap:LongTermDebt us-gaap:LongtermDebtType apls:ConvertibleSeniorNotesDueTwoThousandTwentySix	█▂▁	386.5	358.8	353.8
us-gaap:OperatingLeaseLiabilityNoncurrent	█▁▂	19.125	15.217	15.674
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	█▂▁	5.627	4.842	4.636
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree	█▇▁	4.865	4.826	4.633
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour		NA	4.114	NA

		2021-06-30	2020-12-31	2020-09-30
us-gaap:StockholdersEquity	▁█▆	-141.493	204.557	105.84
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption srt:CumulativeEffectPeriodOfAdoptionAdjustment		NA	-149.734	NA
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:AdditionalPaidInCapital		NA	-165.747	NA
us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:RetainedEarnings		NA	16.013	NA
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	▃▁█	0.036	-0.008	0.122
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome	▁█▁	-1.829	-0.117	-1.759
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment	▁█▁	-1.865	-0.109	-1.881
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital	█▃▁	1173.512	1131.013	1112.203
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock	▄▄▄	0.008	0.008	0.008
us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings	▁█▇	-1313.184	-926.347	-1004.612
us-gaap:CommonStockValue	▄▄▄	0.008	0.008	0.008
us-gaap:AdditionalPaidInCapital	█▃▁	1173.512	1131.013	1112.203
us-gaap:RetainedEarningsAccumulatedDeficit	▁█▇	-1313.184	-926.347	-1004.612
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax	▁█▁	-1.829	-0.117	-1.759
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	▄	17.722	NA	12.099

		2021-06-30	2020-12-31	2020-09-30
us-gaap:NetCashProvidedByUsedInOperatingActivities	▁█▂	-128.688	141.979	-99.824
us-gaap:NetCashProvidedByUsedInInvestingActivities	▆▁█	129.752	-0.091	198.763
us-gaap:NetCashProvidedByUsedInFinancingActivities	▆█▁	4.526	6.317	0.926
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	▁█▅	5.349	150.23	98.219

		2021-06-30	2020-12-31	2020-09-30
us-gaap:AmortizationOfFinancingCosts us-gaap:AdjustmentsForNewAccountingPronouncements apls:AccountingStandardsUpdate202006		NA	NA	NA
us-gaap:AmortizationOfFinancingCosts us-gaap:LongtermDebtType apls:ConvertibleSeniorNotesDueTwoThousandTwentySix	█▁▁	0.3	0.1	0.1
us-gaap:IncreaseDecreaseInAccountsPayable	█▁█	0.874	-2.446	0.792
us-gaap:NetCashProvidedByUsedInOperatingActivities	▁█▂	-128.688	141.979	-99.824
us-gaap:NetIncomeLoss	▁█▃	-219.191	78.265	-135.7
us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings	▄	-219.191	NA	-135.7
us-gaap:ProfitLoss	▁█▃	-219.191	78.265	-135.7
us-gaap:ShareBasedCompensation	█▁▁	17.722	12.494	12.099

		2021-06-30	2020-12-31	2020-09-30
us-gaap:NetCashProvidedByUsedInInvestingActivities	▆▁█	129.752	-0.091	198.763
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment	▁▂█	0.248	0.711	3.738

		2021-06-30	2020-12-31	2020-09-30
us-gaap:NetCashProvidedByUsedInFinancingActivities	▆█▁	4.526	6.317	0.926

		2021-06-30	2020-12-31	2020-09-30

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	8000.0	8000.0	8000.0	8000.0	8000.0	7000.0	6393.0	6387.0	6367.0	6322.0	5628.0	5624.0	5615.0	5042.0	5033.0	847.0	843.0
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

Period End	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	76	75	75	63	63	63	63	56	56	56	50	50	8.472903	8.428366
Percentage of CommonStockSharesIssued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

Period End	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	76	75	75	63	63	63	63	56	56	56	50	50	8.472903	8.428366
Percentage of CommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30
Value	80	79	0.075628	0.07555	0.07372	63	63	57	56	54	50	8.442072	8.428366	8.428366	8.428366
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30
Value	23	24	25	25	15	10	9.10865	9.205097	7.28519	7.3074	7.43238	35	31	65	30
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

apls:ConvertibleNotes

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31
Value	9.981	9.981	13	13	5.575
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	41.6	41.0	51.1	52.0	36.4

us-gaap:EmployeeStockOption

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30
Value	12	13	12	11	9.434	10	9.094586	9.191033	7.271126	7.293336	7.418316	5.152119	4.675118	8.697028	3.831237
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	54.1	55.1	47.2	46.7	61.6	99.9	99.8	99.8	99.8	99.8	99.8	14.6	15.0	13.4	12.7

us-gaap:RestrictedStockUnitsRSU

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31
Value	1.012	0.949	0.433	0.349	0.298
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4.2	3.9	1.7	1.4	1.9

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	1.03	-1.79	-1.57	-2.29
Percentage of EarningsPerShareBasic	100.0	100.0	100.0	100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	0.93	-1.79	-1.57	-2.29
Percentage of EarningsPerShareDiluted	100.0	100.0	100.0	100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31
Value	-2.72	-2.32	1.06	-1.79	-1.57	-2.29	-1.77	-1.1	-1.12	-0.87	-0.65	-0.64	-0.61	-0.43	-3.68	-1.37	-0.67	-0.5	-3.22	-0.86	-0.41	-0.33
Percentage of EarningsPerShareBasicAndDiluted	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	-219.4	-185.162	79	-137.788	-119.298	-167.658	-113.165949	-69.907931	-71.091496	-50.572205	-36.922223	-35.632173	-33.334302	-21.736304	-18.255896	-11.573273
Percentage of ComprehensiveIncomeNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35216.7	0.0	32.0	-21329.4	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30
Value	48	40	44	36	28	29	27	18	12	8.170671	6.390981	6.265125	5.947823	4.035255	4.859961	2.071437	1.710344	1.821409	1.087276	1.000146
Percentage of GeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	7859.9	0.0	17.8	5726.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Interest Expense

us-gaap:InterestExpense us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:InterestExpense

apls:AccountingStandardsUpdate202006

Period End	2021-01-01
Value	17
Percentage of InterestExpense	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax apls:AccountingStandardsUpdate202006	0.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	3.8	4.2	9.6	9.5	6.9	3.9	4.4
Percentage of InterestExpenseDebt	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	610.0	0.0	3.8	1470.6	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax apls:ConvertibleSeniorNotesDueTwoThousandTwentySix	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Interest Paid Net

us-gaap:InterestPaidNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	0.0	6.893	0.0	9.1	0.0	3.829	0.028383	0.230521	0.14	0.588473	0.477639	0.330416	0.456528	0.55175	0.0
Percentage of InterestPaidNet	0.0	100.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	0.0	0.0	0.0	1408.7	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31
Value	-219.191	-183.659	78	-135.7	-118.617	-168.822	-113.217423	-69.824659	-71.090164	-50.574367	-36.459475	-35.972115	-33.3343	-21.736304	-18.255896	-11.573273	-12.126152	-9.050773	-6.620102	-7.210591	-7.294245	-5.999699
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	31.3	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	-219.191	-183.659	-135.7	-118.617	-168.822	-69.824659	-71.090164	-50.574367	-36.459474	-35.545924	-33.334302	-21.736304
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	98.8	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Operating Expenses

us-gaap:OperatingExpenses

Period End	2021-06-30	2020-12-31	2020-09-30	2020-06-30	2019-12-31	2019-09-30
Value	194	119	130	115	105	69
Percentage of OperatingExpenses	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	31285.7	48.0	20154.5	0.0	0.0	0.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31
Value	-194.287	-124.591	130	-129.552	-115.508	-98.786	-105.940283	-69.947962	-63.476438	-48.65057	-37.196592	-35.804581	-33.485442	-21.438145	-17.568845	-11.589319	-12.39449	-9.214375	-6.247048	-7.234204	-7.572638	-6.228452
Percentage of OperatingIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-31185.7	0.0	52.0	-20054.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-174000.0	-1582000.0	1772000.0	-1658000.0	161000.0	-230000.0	51474.0	-83272.0	-1332.0	2162.0	-462750.0	339940.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-27.9	0.0	0.7	-256.7	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-174000.0	-1582000.0	-1658000.0	161000.0	-230000.0	-83272.0	-1332.0	2162.0	-462750.0	-86249.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	-25.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-27.9	0.0	-256.7	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	-209000.0	-1503000.0	-2088000.0	-681000.0	1164000.0	-83000.0	-1000.0	2000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-33.5	0.0	-323.2	0.0	0.0	0.0	0.0	0.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31
Value	-35000.0	79000.0	-430000.0	-842000.0	1394000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax	16.7	-5.3	20.6	123.6	119.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-5.6	0.0	-66.6	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	-174000.0	-1582000.0	-1658000.0	161000.0	-230000.0	-83000.0	-1000.0	2000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax	83.3	105.3	79.4	-23.6	-19.8	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-27.9	0.0	-256.7	0.0	0.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2016-12-31	2016-09-30
Value	-61000.0	1544000.0	-505000.0	-16000.0	5000.0	14000.0	-89373.0	-61048.0	228290.0	-253180.0	-24183.0	-22234.0	-32867.0	-31473.0	-12475.0	16046.0	397.0	-76563.0	23613.0
Percentage of OtherNonoperatingIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-9.8	0.0	-0.2	-2.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Profit Loss

us-gaap:ProfitLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	-219190000.0	-183660000.0	78265000.0	-135700000.0	-118620000.0	-168820000.0	-113220000.0	-69825000.0	-71090000.0	-50574000.0	-36886000.0	-35546000.0	-33334000.0	-21736000.0
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	31.3	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30
Value	95	84	50	93	87	69	78	51	50	40	30	29	27	17	13	9.517882	10	7.231084	5.591572	6.234058
Percentage of ResearchAndDevelopmentExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	15400.2	0.0	20.1	14428.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

Period End	2021-06-30	2020-12-31	2020-09-30
Value	0.623	250	0.646
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	100.0	100.0	100.0

Assets

us-gaap:Assets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	699	810	960	768	870	688	389	466	316	318	203	239	266	163	182	19	27
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Liabilities

us-gaap:Liabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31
Value	841	758	756	662	638	429	355	326	157	93	42	43	37	34	33	3.638938
Percentage of Liabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	120.2	93.6	78.7	86.2	73.3	62.4	91.2	70.1	49.8	29.4	20.9	18.1	14.0	20.9	18.2	13.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	699	810	960	768	870	688	389	466	316	318	203	239	266	163	182	19	27
Percentage of LiabilitiesAndStockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31	2015-12-31	2014-12-31
Value	-141.493	51	204	105	232	258	34	139	159	224	160	195	229	129	148	12	23	34	13
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-20.2	6.4	21.3	13.8	26.7	37.6	8.8	29.9	50.2	70.6	79.1	81.9	86.0	79.1	81.8	63.8	86.7	0.0	0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustment

Period End	2020-12-31
Value	-149.734
Percentage of StockholdersEquity	-73.2
Percentage of Assets	-15.6
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment	0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital

Period End	2020-12-31
Value	-165.747
Percentage of StockholdersEquity	-81.0
Percentage of Assets	-17.3
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital	0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings

Period End	2020-12-31
Value	16
Percentage of StockholdersEquity	7.8
Percentage of Assets	1.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	0.036	0.071	-0.008	0.122	0.552	1.394
Percentage of StockholdersEquity	-0.0	0.1	-0.0	0.1	0.2	0.5
Percentage of Assets	0.0	0.0	-0.0	0.0	0.1	0.2
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-1.829	-1.62	-0.117	-1.759	0.329	1.01	-0.153775	-0.205249	-0.121977	-0.120645	-0.122807	0.339942
Percentage of StockholdersEquity	1.3	-3.1	-0.1	-1.7	0.1	0.4	-0.4	-0.1	-0.1	-0.1	-0.1	0.2
Percentage of Assets	-0.3	-0.2	-0.0	-0.2	0.0	0.1	-0.0	-0.0	-0.0	-0.0	-0.1	0.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	-1.865	-1.691	-0.109	-1.881	-0.223	-0.384	-0.154	-0.205	-0.122	-0.121	-0.123
Percentage of StockholdersEquity	1.3	-3.3	-0.1	-1.8	-0.1	-0.1	-0.4	-0.1	-0.1	-0.1	-0.1
Percentage of Assets	-0.3	-0.2	-0.0	-0.2	-0.0	-0.1	-0.0	-0.0	-0.0	-0.0	-0.1
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	1173	1147	1131	1112	1100	1008	615	608	557	552	437	435	433	300	298	29	28	1.974955
Percentage of StockholdersEquity	-829.4	2220.9	552.9	1050.8	474.3	389.3	1799.2	435.7	350.5	245.7	272.0	222.5	189.0	232.5	200.2	126.1	82.7	14.9
Percentage of Assets	167.7	141.6	117.7	144.8	126.5	146.4	158.2	130.4	176.1	173.5	215.1	182.3	162.6	183.8	163.7	109.3	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	0.008	0.008	0.008	0.008	0.008	0.007	0.006393	0.006387	0.006367	0.006322	0.005628	0.005624	0.005615	0.005042	0.005033	0.000843	0.000843	0.000458
Percentage of StockholdersEquity	-0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	-1313.184	-1093.993	-926.347	-1004.612	-868.912	-750.295	-581.47246	-468.255037	-398.430378	-327.340214	-276.765847	-240.306373	-204.334259	-170.999957	-149.263653	-98.257559	-71.132922	-24.616966
Percentage of StockholdersEquity	928.1	-2117.8	-452.9	-949.2	-374.4	-289.7	-1698.7	-335.5	-250.4	-145.6	-171.9	-122.6	-89.0	-132.5	-100.2	-412.9	-203.4	-186.1
Percentage of Assets	-187.6	-135.0	-96.4	-130.8	-99.9	-108.9	-149.4	-100.4	-125.8	-102.8	-136.0	-100.5	-76.6	-104.8	-82.0	-358.2	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Assets Current

us-gaap:AssetsCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	655	773	917	742	853	672	373	451	308	310	202	238	266	163	182	19	27
Percentage of AssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	93.6	95.5	95.5	96.6	98.1	97.6	95.9	96.7	97.4	97.5	99.5	99.9	100.0	99.9	99.9	99.4	99.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2015-12-31	2014-12-31
Value	270	265	565	415	317	417	351	433	289	288	176	220	253	152	175	13	4.939087	16	24	31	36	13
Percentage of CashAndCashEquivalentsAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	38.7	32.8	58.9	54.1	36.5	60.7	90.4	93.1	91.3	90.5	86.6	92.3	95.1	93.7	96.4	68.6	0.0	0.0	90.6	0.0	0.0	0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31
Value	272	266	567	416	318	418	351	433	289	288	176	220	253	152	175	24	36
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	38.9	33.0	59.0	54.2	36.6	60.8	90.4	93.1	91.3	90.5	86.6	92.3	95.1	93.7	96.4	90.6	0.0

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	311	312	515	228
Percentage of MarketableSecuritiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	46.9	56.6	32.5	40.7	59.2	33.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

Period End	2021-06-30
Value	719000.0
Percentage of AccountsReceivableNetCurrent	100.0
Percentage of Assets	0.1

Inventory Net

us-gaap:InventoryNet

Period End	2021-06-30
Value	3731000.0
Percentage of InventoryNet	100.0
Percentage of Assets	0.5

Inventory Raw Materials And Supplies

us-gaap:InventoryRawMaterialsAndSupplies

Period End	2021-06-30
Value	3700000.0
Percentage of InventoryRawMaterialsAndSupplies	100.0
Percentage of Assets	0.5

Other Assets Current

us-gaap:OtherAssetsCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	31	31	26	1.637	1.828	1.891	1.307591	2.45753	3.355995	0.01557	0.364113	0.081532	0.007695	0.205713	0.014823	3.65352	1.157438
Percentage of OtherAssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.5	3.9	2.8	0.2	0.2	0.3	0.3	0.5	1.1	0.0	0.2	0.0	0.0	0.1	0.0	19.1	4.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	6750000.0	7077000.0	6803000.0	6531000.0	2416000.0	1972000.0	1655000.0	1592800.0	1439100.0	1041100.0	977920.0
Percentage of PropertyPlantAndEquipmentNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.0	0.9	0.7	0.9	0.3	0.3	0.4	0.3	0.5	0.3	0.5

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2019-01-01
Value	21	22	17	18	12	13	14	13	6.6	6.6	5.511865
Percentage of OperatingLeaseRightOfUseAsset	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.1	2.8	1.8	2.4	1.5	2.0	3.6	2.9	2.1	2.1	0.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	16	6.909	18	0.909	0.906	0.845	0.385088	0.236515	0.207873	0.162345	1.094338	0.212979	0.11615	0.11615	0.11615	0.10835	0.064528
Percentage of OtherAssetsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.3	0.9	2.0	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.5	0.1	0.0	0.1	0.1	0.6	0.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	5.339	4.158	8.477	11	9.927	3.078	8.360527	11	13	11	10	5.4688	5.133017	4.585058	3.663253	4.001059	2.547212
Percentage of AccountsPayableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.8	0.5	0.9	1.4	1.1	0.4	2.1	2.5	4.4	3.7	5.0	2.3	1.9	2.8	2.0	20.9	9.3

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	134	69	111	60	45	44	54	30	20	7.342601	5.103002	10	5.121178	2.709801	2.890705	2.936885	1.091726
Percentage of AccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	19.2	8.6	11.7	7.9	5.2	6.5	14.1	6.5	6.4	2.3	2.5	4.4	1.9	1.7	1.6	15.3	4.0

us-gaap:AccruedLiabilitiesCurrent us-gaap:TypeOfArrangement

apls:SobiAgreementAndAnotherLicensingTransaction

Period End	2020-12-31
Value	25
Percentage of AccruedLiabilitiesCurrent	22.3
Percentage of Assets	2.6
Percentage of Assets apls:SobiAgreementAndAnotherLicensingTransaction	0.0

Liabilities Current

us-gaap:LiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	157	83	128	75	57	50	65	44	35	20	17	16	10	7.294859	6.553958	6.937944	3.638938
Percentage of LiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	22.5	10.3	13.4	9.8	6.7	7.4	16.9	9.6	11.2	6.4	8.4	6.7	3.8	4.5	3.6	36.2	13.3

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	4035000.0	3902000.0	3685000.0	3438000.0	2664000.0	2732000.0	2609000.0
Percentage of OperatingLeaseLiabilityCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.6	0.5	0.4	0.4	0.3	0.4	0.7

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	26	24	16	8.086	9.986	7.002	6.890676	4.50131	0.956129	0.863125	1.352386	0.360688	0.180859	0.148645	0.175406	0.203184	0.129062
Percentage of OtherAccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.8	3.1	1.7	1.1	1.1	1.0	1.8	1.0	0.3	0.3	0.7	0.2	0.1	0.1	0.1	1.1	0.5

Long Term Debt

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:LongTermDebt

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30
Value	386	386	358	353	348	144	142	140
Percentage of LongTermDebt	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	55.2	47.7	37.4	46.0	40.1	21.0	36.6	30.2
Percentage of Assets apls:ConvertibleSeniorNotesDueTwoThousandTwentySix	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	19	19	15	15	10	11	11
Percentage of OperatingLeaseLiabilityNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.7	2.5	1.6	2.0	1.2	1.7	3.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	5627000.0	5480000.0	4842000.0	4636000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	100.0	100.0	100.0	100.0
Percentage of Assets	0.8	0.7	0.5	0.6

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	4865000.0	4811000.0	4826000.0	4633000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree	100.0	100.0	100.0	100.0
Percentage of Assets	0.7	0.6	0.5	0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

Period End	2020-12-31
Value	4114000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour	100.0
Percentage of Assets	0.4

Operating Lease Liability

us-gaap:OperatingLeaseLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2019-01-01
Value	23	23	18	19	13	14	14	13	6.8	6.694531	5.511865
Percentage of OperatingLeaseLiability	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.3	2.9	2.0	2.5	1.5	2.1	3.7	2.9	2.1	2.1	0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	28	29	22	23	16	17	17
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.0	3.6	2.3	3.0	1.8	2.5	4.5

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue us-gaap:StatementGeographical, us-gaap:TypeOfArrangement

apls:WalthamMassachusetts, apls:AmendedWalthamOfficeSpaceLease

Period End	2020-12-31
Value	19
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue	86.3
Percentage of Assets	2.0
Percentage of Assets apls:WalthamMassachusetts apls:AmendedWalthamOfficeSpaceLease	0.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	5035000.0	5366000.0	3587000.0	3985000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	100.0	100.0	100.0	100.0
Percentage of Assets	0.7	0.7	0.4	0.5

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31	2015-12-31	2014-12-31
Value	-141.493	51	204	105	232	258	34	139	159	224	160	195	229	129	148	12	23	34	13
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-20.2	6.4	21.3	13.8	26.7	37.6	8.8	29.9	50.2	70.6	79.1	81.9	86.0	79.1	81.8	63.8	86.7	0.0	0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustment

Period End	2020-12-31
Value	-149.734
Percentage of StockholdersEquity	-73.2
Percentage of Assets	-15.6
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment	0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital

Period End	2020-12-31
Value	-165.747
Percentage of StockholdersEquity	-81.0
Percentage of Assets	-17.3
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital	0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings

Period End	2020-12-31
Value	16
Percentage of StockholdersEquity	7.8
Percentage of Assets	1.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	0.036	0.071	-0.008	0.122	0.552	1.394
Percentage of StockholdersEquity	-0.0	0.1	-0.0	0.1	0.2	0.5
Percentage of Assets	0.0	0.0	-0.0	0.0	0.1	0.2
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-1.829	-1.62	-0.117	-1.759	0.329	1.01	-0.153775	-0.205249	-0.121977	-0.120645	-0.122807	0.339942
Percentage of StockholdersEquity	1.3	-3.1	-0.1	-1.7	0.1	0.4	-0.4	-0.1	-0.1	-0.1	-0.1	0.2
Percentage of Assets	-0.3	-0.2	-0.0	-0.2	0.0	0.1	-0.0	-0.0	-0.0	-0.0	-0.1	0.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	-1.865	-1.691	-0.109	-1.881	-0.223	-0.384	-0.154	-0.205	-0.122	-0.121	-0.123
Percentage of StockholdersEquity	1.3	-3.3	-0.1	-1.8	-0.1	-0.1	-0.4	-0.1	-0.1	-0.1	-0.1
Percentage of Assets	-0.3	-0.2	-0.0	-0.2	-0.0	-0.1	-0.0	-0.0	-0.0	-0.0	-0.1
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	1173	1147	1131	1112	1100	1008	615	608	557	552	437	435	433	300	298	29	28	1.974955
Percentage of StockholdersEquity	-829.4	2220.9	552.9	1050.8	474.3	389.3	1799.2	435.7	350.5	245.7	272.0	222.5	189.0	232.5	200.2	126.1	82.7	14.9
Percentage of Assets	167.7	141.6	117.7	144.8	126.5	146.4	158.2	130.4	176.1	173.5	215.1	182.3	162.6	183.8	163.7	109.3	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	0.008	0.008	0.008	0.008	0.008	0.007	0.006393	0.006387	0.006367	0.006322	0.005628	0.005624	0.005615	0.005042	0.005033	0.000843	0.000843	0.000458
Percentage of StockholdersEquity	-0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	-1313.184	-1093.993	-926.347	-1004.612	-868.912	-750.295	-581.47246	-468.255037	-398.430378	-327.340214	-276.765847	-240.306373	-204.334259	-170.999957	-149.263653	-98.257559	-71.132922	-24.616966
Percentage of StockholdersEquity	928.1	-2117.8	-452.9	-949.2	-374.4	-289.7	-1698.7	-335.5	-250.4	-145.6	-171.9	-122.6	-89.0	-132.5	-100.2	-412.9	-203.4	-186.1
Percentage of Assets	-187.6	-135.0	-96.4	-130.8	-99.9	-108.9	-149.4	-100.4	-125.8	-102.8	-136.0	-100.5	-76.6	-104.8	-82.0	-358.2	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	8000.0	8000.0	8000.0	8000.0	8000.0	7000.0	6393.0	6387.0	6367.0	6322.0	5628.0	5624.0	5615.0	5042.0	5033.0	847.0	843.0
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	1173	1147	1131	1112	1100	1008	615	608	557	552	437	435	433	300	298	31	29
Percentage of AdditionalPaidInCapital	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	167.7	141.6	117.7	144.8	126.5	146.4	158.2	130.4	176.1	173.5	215.1	182.3	162.6	183.8	163.7	164.1	109.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	-1313200000.0	-1094000000.0	-926350000.0	-1004600000.0	-868910000.0	-750300000.0	-581470000.0	-468260000.0	-398430000.0	-327340000.0	-276770000.0	-240310000.0	-204330000.0	-171000000.0	-149260000.0	-131010000.0	-98258000.0
Percentage of RetainedEarningsAccumulatedDeficit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-187.6	-135.0	-96.4	-130.8	-99.9	-108.9	-149.4	-100.4	-125.8	-102.8	-136.0	-100.5	-76.6	-104.8	-82.0	-684.4	-358.2

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	-1829000.0	-1620000.0	-117000.0	-1759000.0	329000.0	1010000.0	-153780.0	-205250.0	-121980.0	-120640.0	-122810.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-0.3	-0.2	-0.0	-0.2	0.0	0.1	-0.0	-0.0	-0.0	-0.0	-0.1

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	17	16	12	11	9.294	5.295152	4.183221	4.558588	1.828617	2.050924	2.243527	1.610188	4.16434
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	17	16	12	11	9.294	5.295152	4.183221	4.558588	1.828617	2.050924	2.243527	1.610188
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	-128.688	-153.314	141	-99.824	-94.294	-108.349	-82.071683	-53.59764	-39.905638	-35.560484	-44.478223	-33.132448	-30.694877	-22.935249	-15.532804	-11.137868
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-20656.2	0.0	56.8	-15452.6	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	129	-146.765	-0.091	198	-287.807	-227.854	-0.155	-0.471	-0.192	-0.875
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	20827.0	0.0	-0.0	30768.3	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	4.526	1.632	6.317	0.926	281	403	0.20961	198	40	148	0.115657	-0.038434	131	0.222697	178
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	726.5	0.0	2.5	143.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	5.349	-300.058	150	98	-100.301	66	-82.009559	144	0.881863	111	-44.373152	-33.198722	100	-22.712552
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	858.6	0.0	60.1	15204.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AmortizationOfFinancingCosts

apls:AccountingStandardsUpdate202006

Period End	2021-01-01
Value	1100000.0
Percentage of AmortizationOfFinancingCosts	100.0

us-gaap:AmortizationOfFinancingCosts us-gaap:LongtermDebtType

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30
Value	300000.0	400000.0	100000.0	100000.0	100000.0	100000.0	100000.0	9031.0
Percentage of AmortizationOfFinancingCosts	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31
Value	874000.0	-4170000.0	-2446000.0	792000.0	6837000.0	-5237000.0	-3433400.0	-2008300.0	1894400.0	1906500.0	4792600.0	325080.0	547960.0	921800.0	-521550.0	1396700.0	237520.0	-180330.0	-249580.0
Percentage of IncreaseDecreaseInAccountsPayable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	-128.688	-153.314	141	-99.824	-94.294	-108.349	-82.071683	-53.59764	-39.905638	-35.560484	-44.478223	-33.132448	-30.694877	-22.935249	-15.532804	-11.137868
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-20656.2	0.0	56.8	-15452.6	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31
Value	-219.191	-183.659	78	-135.7	-118.617	-168.822	-113.217423	-69.824659	-71.090164	-50.574367	-36.459475	-35.972115	-33.3343	-21.736304	-18.255896	-11.573273	-12.126152	-9.050773	-6.620102	-7.210591	-7.294245	-5.999699
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	31.3	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	-219.191	-183.659	-135.7	-118.617	-168.822	-69.824659	-71.090164	-50.574367	-36.459474	-35.545924	-33.334302	-21.736304
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	98.8	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Profit Loss

us-gaap:ProfitLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	-219.191	-183.659	78	-135.7	-118.617	-168.822	-113.217423	-69.824659	-71.090164	-50.574367	-36.885665	-35.545923	-33.334302	-21.736304
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	-35183.1	0.0	31.3	-21006.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Share Based Compensation

us-gaap:ShareBasedCompensation

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31
Value	17	16	12	12	11	9.294	7.107068	5.295152	4.183221	4.558588	1.828617	2.050924	2.243527	1.610188	4.16434	0.545537	0.380924	0.327909	0.316559
Percentage of ShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	129	-146.765	-0.091	198	-287.807	-227.854	-0.155	-0.471	-0.192	-0.875
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	20827.0	0.0	-0.0	30768.3	0.0	0.0	0.0	0.0	0.0	0.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	248000.0	484000.0	711000.0	3738000.0	538000.0	435000.0	155000.0	471000.0	192000.0	875000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	4.526	1.632	6.317	0.926	281	403	0.20961	198	40	148	0.115657	-0.038434	131	0.222697	178
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax	726.5	0.0	2.5	143.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2017-09-30	2016-12-31	2015-12-31	2014-12-31
Value	19.13	13.52	8.09	4.78	3.04	2.84	2.71	2.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	397	156	79	41	30
Percentage of DeferredTaxAssetsValuationAllowance	100.0	100.0	100.0	100.0	100.0

apls:AdditionalAmountIssuedInPaymentOfIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:AdditionalAmountIssuedInPaymentOfIssuanceCosts

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	3100000.0
Percentage of AdditionalAmountIssuedInPaymentOfIssuanceCosts	100.0

apls:AdjustmentsToAdditionalPaidInCapitalForfeitureOfAccruedInterestInExchangeOfConvertibleNotes

Period End	2021-03-31
Value	1668000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalForfeitureOfAccruedInterestInExchangeOfConvertibleNotes	100.0

apls:AdjustmentsToAdditionalPaidInCapitalForfeitureOfAccruedInterestInExchangeOfConvertibleNotes us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-03-31
Value	1668000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalForfeitureOfAccruedInterestInExchangeOfConvertibleNotes	100.0

apls:AmortizationOfDiscountsForConvertibleNotesNetOfFinancingCosts

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	5.06	4.928	3.554	1.994	1.952
Percentage of AmortizationOfDiscountsForConvertibleNotesNetOfFinancingCosts	100.0	100.0	100.0	100.0	100.0

apls:AnnualLicenseMaintenanceFees us-gaap:TypeOfArrangement

apls:AnnualLicenseMaintenanceFees

apls:TwoThousandTenLicenseAgreement

Period End	2021-06-30	2021-03-31
Value	0	100000.0
Percentage of AnnualLicenseMaintenanceFees	0.0	100.0

apls:ContraResearchAndDevelopmentExpense

Period End	2021-06-30	2021-03-31
Value	9.1	8.1
Percentage of ContraResearchAndDevelopmentExpense	100.0	100.0

apls:ContractResearchAndDevelopmentReimbursement us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:ContractResearchAndDevelopmentReimbursement

apls:SwedishOrphanBiovitrumABPubl, apls:CollaborationAndLicenseAgreement

Period End	2021-06-30	2021-03-31
Value	0.0	80
Percentage of ContractResearchAndDevelopmentReimbursement	0.0	100.0

apls:CostOfResearchCollaboration

Period End	2021-06-30
Value	50
Percentage of CostOfResearchCollaboration	100.0

apls:DevelopmentCostReimbursement us-gaap:CounterpartyName

apls:DevelopmentCostReimbursement

apls:SwedishOrphanBiovitrumABPubl

Period End	2020-10-27
Value	80
Percentage of DevelopmentCostReimbursement	100.0

apls:DevelopmentCostReimbursement us-gaap:CounterpartyName, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, us-gaap:AccountingStandardsUpdate201818, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	80
Percentage of DevelopmentCostReimbursement	100.0

apls:DevelopmentCostReimbursement us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, us-gaap:SubsequentEvent, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	80
Percentage of DevelopmentCostReimbursement	100.0

apls:DevelopmentCostReimbursement us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	80
Percentage of DevelopmentCostReimbursement	100.0

apls:ForfeitureOfAccruedInterestInExchangeOfConvertibleNotes

Period End	2021-06-30	2021-03-31
Value	0	1668000.0
Percentage of ForfeitureOfAccruedInterestInExchangeOfConvertibleNotes	0.0	100.0

apls:ForfeitureOfAccruedInterestInExchangeOfConvertibleNotes us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	1700000.0
Percentage of ForfeitureOfAccruedInterestInExchangeOfConvertibleNotes	0.0

apls:InterestExpenseNonoperating

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	3.767	4.175	9.61	9.499	6.909	3.919	3.930231	0.601377	0.159497	0.593505	1.242213	0.577534	0.603656	0.667087
Percentage of InterestExpenseNonoperating	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

apls:LossOnConversionOfDebt

Period End	2021-06-30	2021-03-31
Value	0.0	39
Percentage of LossOnConversionOfDebt	0.0	100.0

apls:LossOnConversionOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	39
Percentage of LossOnConversionOfDebt	0.0

apls:LossOnConversionOfDebtRelatedToAdditionalSharesIssued us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:LossOnConversionOfDebtRelatedToAdditionalSharesIssued

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	36
Percentage of LossOnConversionOfDebtRelatedToAdditionalSharesIssued	100.0

apls:MinimumPaymentOfAdditionalFundingAmount

Period End	2021-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	-4.0	20	20	40	60
Percentage of MinimumPaymentOfAdditionalFundingAmount	100.0	100.0	100.0	100.0	100.0

apls:NonRefundableUpfrontPayment us-gaap:CounterpartyName

apls:NonRefundableUpfrontPayment

apls:SwedishOrphanBiovitrumABPubl

Period End	2020-10-27
Value	250
Percentage of NonRefundableUpfrontPayment	100.0

apls:OperatingLeaseRightOfUseAssetAmortization

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31
Value	6000.0	112000.0	125000.0	27000.0	57000.0	78000.0	76000.0	73000.0
Percentage of OperatingLeaseRightOfUseAssetAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

apls:PaymentMadeUnderAgreement us-gaap:TypeOfArrangement

apls:PaymentMadeUnderAgreement

apls:SFJAgreement

Period End	2021-06-30
Value	4000000.0
Percentage of PaymentMadeUnderAgreement	100.0

apls:PercentageOfRoyaltyFeesPayments us-gaap:Range

apls:PercentageOfRoyaltyFeesPayments

srt:Maximum

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	0	6.0	0	5.94	0	0.06	0
Percentage of PercentageOfRoyaltyFeesPayments	0.0	100.0	0.0	100.0	0.0	100.0	0.0

srt:Minimum

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	0	3.0	0	2.97	0	0.03	0
Percentage of PercentageOfRoyaltyFeesPayments	0.0	50.0	0.0	50.0	0.0	50.0	0.0

apls:PremiumPaidForCappedCallTransaction us-gaap:DebtInstrument

apls:PremiumPaidForCappedCallTransaction

apls:TwoThousandNineteenConvertibleNotes

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	0.0	28	0.0	0.0
Percentage of PremiumPaidForCappedCallTransaction	0.0	100.0	0.0	0.0

apls:TwoThousandTwentyConvertibleNotes

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	0.0	43	0.0	0.0
Percentage of PremiumPaidForCappedCallTransaction	0.0	151.8	0.0	0.0

apls:ProceedsFromContractResearchAndDevelopment us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:ProceedsFromContractResearchAndDevelopment

apls:SwedishOrphanBiovitrumABPubl, apls:CollaborationAndLicenseAgreement

Period End	2021-01-31
Value	25
Percentage of ProceedsFromContractResearchAndDevelopment	100.0

apls:ProceedsFromDevelopmentDerivativeLiability

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	0.0	0.0	0.0	20	0.0	20	40	60
Percentage of ProceedsFromDevelopmentDerivativeLiability	0.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0

apls:ProceedsFromIssuanceOfConvertibleNotesNetOfIssuanceCosts

Period End	2020-12-31	2020-09-30	2019-12-31
Value	0.0	-0.2	-0.488
Percentage of ProceedsFromIssuanceOfConvertibleNotesNetOfIssuanceCosts	0.0	100.0	100.0

apls:UpfrontPayment us-gaap:CounterpartyName, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:TypeOfArrangement

apls:UpfrontPayment

apls:SwedishOrphanBiovitrumABPubl, us-gaap:AccountingStandardsUpdate201818, apls:CollaborationAndLicenseAgreement

Period End	2020-11-30
Value	250
Percentage of UpfrontPayment	100.0

apls:UpfrontPayment us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

apls:BeamTherapeuticsInc, us-gaap:SubsequentEvent, apls:CollaborationAndLicenseAgreement

Period End	2021-07-31
Value	50
Percentage of UpfrontPayment	0.0

apls:BeamTherapeuticsIncorporation, us-gaap:SubsequentEvent, apls:ResearchCollaborationAgreement

Period End	2021-07-31
Value	50
Percentage of UpfrontPayment	0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature

Period End	2020-09-30	2020-06-30	2019-09-30
Value	-1.662	122	72
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature	100.0	100.0	100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-09-30	2020-06-30	2019-09-30
Value	-1.662	122	72
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature	100.0	100.0	100.0

us-gaap:AmortizationOfDebtDiscountPremium

Period End	2021-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	0.36	0.0	0.013725	0.019	0.019
Percentage of AmortizationOfDebtDiscountPremium	100.0	0.0	100.0	100.0	100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:LongtermDebtType

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30
Value	4.9	4.8	3.4	1.9	2.089368	0.224655
Percentage of AmortizationOfDebtDiscountPremium	0.0	0.0	0.0	0.0	0.0	1636.8

us-gaap:DebtConversionConvertedInstrumentAmount1

Period End	2021-06-30	2021-03-31
Value	0.0	126
Percentage of DebtConversionConvertedInstrumentAmount1	0.0	100.0

us-gaap:DebtConversionConvertedInstrumentAmount1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenAndTwoThousandTwentyConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, us-gaap:SubsequentEvent, apls:ExchangeAgreements

Period End	2021-07-31
Value	201
Percentage of DebtConversionConvertedInstrumentAmount1	0.0

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, us-gaap:SubsequentEvent, apls:ExchangeAgreements

Period End	2021-01-06
Value	126
Percentage of DebtConversionConvertedInstrumentAmount1	0.0

us-gaap:DebtConversionConvertedInstrumentAmount1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-06-30	2021-03-31	2021-01-31
Value	0.0	126	126
Percentage of DebtConversionConvertedInstrumentAmount1	0.0	100.0	0.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:DebtInstrumentConvertibleConversionRatio1

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	25.34
Percentage of DebtInstrumentConvertibleConversionRatio1	100.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31
Value	0	25.34	0
Percentage of DebtInstrumentConvertibleConversionRatio1	0.0	0.0	0.0

us-gaap:DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31
Value	0	130.0	0
Percentage of DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger	0.0	100.0	0.0

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet

apls:AccountingStandardsUpdate202006

Period End	2021-01-01
Value	149
Percentage of DebtInstrumentIncreaseDecreaseForPeriodNet	100.0

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	-122.8
Percentage of DebtInstrumentIncreaseDecreaseForPeriodNet	0.0

us-gaap:Depreciation

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	442000.0	282000.0	267000.0	190000.0	95000.0	85000.0	87000.0	66000.0	46000.0	41000.0
Percentage of Depreciation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DerivativeGainLossOnDerivativeNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	-21180000.0	-17084000.0	-40090000.0	2697000.0	2770000.0	-68406000.0	-4736000.0	-263000.0	-9104000.0	-736000.0
Percentage of DerivativeGainLossOnDerivativeNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:TypeOfArrangement

apls:SFJAgreement

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	-21200000.0	-17100000.0	-40100000.0	2700000.0	2800000.0	-68400000.0	-4739000.0	-263000.0	-9104000.0	-736000.0
Percentage of DerivativeGainLossOnDerivativeNet	100.1	100.1	100.0	100.1	101.1	100.0	100.1	100.0	100.0	100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	-241000.0	-1611000.0	2025000.0	-1646000.0	132000.0	-152000.0	8300.0	-15598.0	16000.0	-4000.0	-10586.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31
Value	65	-42.802	50	13	0.421	-9.991	24	10	12	2.764408	-5.461504	5.465051	2.411377	-0.180904	-0.04618	-0.577086	2.067473	0.354772	-0.823502
Percentage of IncreaseDecreaseInAccruedLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-03-31
Value	0.069	4.242	25	-0.197	0.153	0.671	-1.171628	-2.155786	3.064915	-0.024854	0.29621	0.020279	-0.195354	0.188226	-1.936041	-0.217759
Percentage of IncreaseDecreaseInOtherCurrentAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2017-12-31	2016-12-31
Value	9.188	-11.946	17	0.001	0.058	0.46	0.202771	0.029018	0.045	0.046	0.881359	0.0078	-0.065336
Percentage of IncreaseDecreaseInOtherNoncurrentAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInPrepaidExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	1.654	5.819	-0.235	-6.626	-4.881	3.004	5.059719	0.765742	-6.532304	-3.824196	7.478756	5.998668	2.735685	3.062009	2.189768	0.279691
Percentage of IncreaseDecreaseInPrepaidExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebtExcludingAmortization

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	3.4	3.8	4.6	4.6	3.4	1.9
Percentage of InterestExpenseDebtExcludingAmortization	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InvestmentIncomeNonoperating

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	104000.0	134000.0	194000.0	670000.0	1025000.0	2275000.0	1478500.0	1341800.0	1421500.0	867020.0	1491800.0	858420.0	787660.0	400400.0
Percentage of InvestmentIncomeNonoperating	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LongTermPurchaseCommitmentAmount

Period End	2020-12-31
Value	10
Percentage of LongTermPurchaseCommitmentAmount	100.0

us-gaap:LongTermPurchaseCommitmentAmount us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SubsequentEvent, apls:BachemAmericasIncAndBachemAG

Period End	2021-04-01
Value	2.9
Percentage of LongTermPurchaseCommitmentAmount	0.0

us-gaap:SubsequentEvent, apls:NOFCorporationAndNOFAmericaCorporation

Period End	2021-04-01
Value	6.4
Percentage of LongTermPurchaseCommitmentAmount	0.0

us-gaap:SubsequentEvent, apls:PurchaseCommitmentsThroughJuneTwoThousandAndTwentyThree

Period End	2021-07-01
Value	5.0
Percentage of LongTermPurchaseCommitmentAmount	0.0

us-gaap:SubsequentEvent, apls:PurchaseCommitmentsThroughJuneTwoThousandAndTwentyTwo

Period End	2021-07-01
Value	9.6
Percentage of LongTermPurchaseCommitmentAmount	0.0

us-gaap:LongTermPurchaseCommitmentAmount us-gaap:TypeOfArrangement

apls:BachemAmericasIncAndBachemAG

Period End	2021-03-31
Value	16
Percentage of LongTermPurchaseCommitmentAmount	0.0

apls:NOFCorporationAndNOFAmericaCorporation

Period End	2021-03-31
Value	32
Percentage of LongTermPurchaseCommitmentAmount	0.0

us-gaap:OperatingLeaseCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	1400000.0	1300000.0	1300000.0	1100000.0	1000000.0	1000000.0	951870.0	561750.0	482830.0	400000.0
Percentage of OperatingLeaseCost	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLeasePayments

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	1357000.0	1588000.0	1410000.0	1266000.0	1088000.0	968000.0	790000.0	510000.0	382000.0	331000.0
Percentage of OperatingLeasePayments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-209000.0	-1503000.0	1642000.0	-2088000.0	-681000.0	1164000.0	51474.0	-83272.0	-1332.0	2000.0	-36558.0	-86249.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	-35000.0	79000.0	-130000.0	-430000.0	-842000.0	1394000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31
Value	-35000.0	79000.0	-430000.0	-842000.0	1394000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	100.0	100.0	100.0	100.0	100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

Period End	2021-06-30	2021-03-31
Value	234000.0	956000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	0.0	171	311	-0.001	339	227
Percentage of PaymentsToAcquireAvailableForSaleSecurities	0.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromCollaborators us-gaap:TypeOfArrangement

us-gaap:ProceedsFromCollaborators

apls:SFJAgreement

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2020-01-31	2019-12-31	2019-09-30	2019-06-27	2019-06-30	2019-02-28	2019-03-31
Value	0.0	140	0.0	0.0	0.0	20	20	-60.0	20	20	40	60	60
Percentage of ProceedsFromCollaborators	0.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	0.0	0.0	-0.17	381	-0.658152	0.0	-0.02274	110	0.0	-0.130997
Percentage of ProceedsFromIssuanceOfCommonStock	0.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	0.0	100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	130	25	312	202
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromStockOptionsExercised

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	7062000.0	2588000.0	1126000.0	1355000.0	1674000.0	929710.0	1262200.0	192000.0	114990.0	275750.0	225360.0
Percentage of ProceedsFromStockOptionsExercised	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromStockPlans

Period End	2020-12-31	2020-09-30
Value	1054000.0	0
Percentage of ProceedsFromStockPlans	100.0	0.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings

Period End	2021-06-30	2021-03-31
Value	-233000.0	-956000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings	100.0	100.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31
Value	-233000.0	-956000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings	100.0	100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	0.0	5.675	0.573	6.33	0.0	0.334	-4.095	7.009	0.347	6.94
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

Period End	2021-03-31
Value	162
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-03-31
Value	162
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

Period End	2021-06-30	2020-06-30
Value	1698000.0	521000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2020-06-30
Value	1698000.0	521000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	7062000.0	2588000.0	1127000.0	1355000.0	1674000.0	954390.0	1262200.0	192000.0	111410.0	114990.0	275750.0	225360.0	7501.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	7062000.0	2588000.0	1127000.0	1354000.0	1674000.0	954370.0	1262100.0	192000.0	111410.0	114980.0	275730.0	225350.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised	100.0	100.0	100.0	99.9	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockholdersEquityPeriodIncreaseDecrease us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:StockholdersEquityPeriodIncreaseDecrease

apls:AccountingStandardsUpdate202006

Period End	2021-01-01
Value	-149700000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease	100.0

us-gaap:StockholdersEquityPeriodIncreaseDecrease us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

apls:AccountingStandardsUpdate202006, us-gaap:RetainedEarnings

Period End	2021-01-01
Value	-16000000.0
Percentage of StockholdersEquityPeriodIncreaseDecrease	10.7

apls:AccruedCostOfResearchCollaborationCurrent

Period End	2021-06-30
Value	50
Percentage of AccruedCostOfResearchCollaborationCurrent	100.0

apls:AccruedLicenseFeesCurrent

Period End	2020-12-31
Value	25
Percentage of AccruedLicenseFeesCurrent	100.0

apls:AccruedPayrollLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	17	11	22	17	11	7.898	11	7.586198	6.12612	1.777244	0.269046	2.349845	1.461919	0.703186	0.251491	1.072751	0.091598
Percentage of AccruedPayrollLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

apls:AccruedResearchAndDevelopmentCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	39	32	47	35	23	30	36	18	13	4.702232	3.48157	7.855107	3.4784	1.85797	2.463808	1.66095	0.871066
Percentage of AccruedResearchAndDevelopmentCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

apls:AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents us-gaap:CounterpartyName, us-gaap:Range, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:TypeOfArrangement

apls:AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents

apls:SwedishOrphanBiovitrumABPubl, srt:Maximum, us-gaap:AccountingStandardsUpdate201818, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	915
Percentage of AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents	100.0

apls:AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents us-gaap:CounterpartyName, us-gaap:Range, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, srt:Maximum, us-gaap:SubsequentEvent, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	915
Percentage of AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents	100.0

apls:AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents us-gaap:CounterpartyName, us-gaap:Range, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, srt:Maximum, apls:CollaborationAndLicenseAgreement

Period End	2020-10-27
Value	915
Percentage of AggregateMilestonePaymentsUponAchievementOfSpecifiedOneTimeRegulatoryAndCommercialMilestoneEvents	100.0

apls:CashAndCashEquivalentsAndMarketableSecurities

Period End	2020-12-31
Value	877
Percentage of CashAndCashEquivalentsAndMarketableSecurities	100.0

apls:CollaborativeArrangementUpFrontPaymentInNextTwelveMonths us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:CollaborativeArrangementUpFrontPaymentInNextTwelveMonths

apls:BeamTherapeuticsIncorporation, apls:ResearchCollaborationAgreement

Period End	2021-06-30
Value	25
Percentage of CollaborativeArrangementUpFrontPaymentInNextTwelveMonths	100.0

apls:CollaborativeArrangementUpfrontNonRefundableAmountPayable us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

apls:CollaborativeArrangementUpfrontNonRefundableAmountPayable

apls:BeamTherapeuticsIncorporation, apls:AccruedLiabilitiesCurrent, apls:ResearchCollaborationAgreement

Period End	2021-06-30
Value	50
Percentage of CollaborativeArrangementUpfrontNonRefundableAmountPayable	100.0

apls:CollaborativeArrangementUpfrontNonRefundableAmountPayable us-gaap:CounterpartyName, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

apls:BeamTherapeuticsIncorporation, us-gaap:SubsequentEvent, apls:ResearchCollaborationAgreement

Period End	2021-07-31
Value	50
Percentage of CollaborativeArrangementUpfrontNonRefundableAmountPayable	0.0

apls:ContraResearchAndDevelopmentCurrent

Period End	2020-12-31
Value	25
Percentage of ContraResearchAndDevelopmentCurrent	100.0

apls:ContractResearchAndDevelopmentCurrent

Period End	2021-06-30	2021-03-31	2020-12-31
Value	20	20	25
Percentage of ContractResearchAndDevelopmentCurrent	100.0	100.0	100.0

apls:ContractResearchAndDevelopmentLongTermAssets

Period End	2020-12-31
Value	18
Percentage of ContractResearchAndDevelopmentLongTermAssets	100.0

apls:ContractResearchAndDevelopmentOtherAssets

Period End	2021-06-30	2021-03-31
Value	15	6.1
Percentage of ContractResearchAndDevelopmentOtherAssets	100.0	100.0

apls:ContractResearchAndDevelopmentReceivable

Period End	2020-12-31
Value	43
Percentage of ContractResearchAndDevelopmentReceivable	100.0

apls:ContractResearchAndDevelopmentReceivable us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:SwedishOrphanBiovitrumABPubl, apls:CollaborationAndLicenseAgreement

Period End	2021-06-30	2021-03-31
Value	35	26
Percentage of ContractResearchAndDevelopmentReceivable	0.0	0.0

apls:ConvertibleSeniorNotesNoncurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass

apls:ConvertibleSeniorNotesNoncurrent

us-gaap:FairValueInputsLevel1, apls:ConvertibleSeniorNotes

Period End	2021-06-30	2021-03-31
Value	739	547
Percentage of ConvertibleSeniorNotesNoncurrent	100.0	100.0

us-gaap:FairValueInputsLevel2, apls:ConvertibleSeniorNotes

Period End	2020-12-31
Value	676
Percentage of ConvertibleSeniorNotesNoncurrent	0.0

us-gaap:FairValueInputsLevel3, apls:ConvertibleSeniorNotes

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	676	371	378	155	149
Percentage of ConvertibleSeniorNotesNoncurrent	0.0	0.0	0.0	0.0	0.0

apls:DeferredTaxAssetsOrphanDrugCredits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	14	9.380475	7.165354	4.928666	3.502686
Percentage of DeferredTaxAssetsOrphanDrugCredits	100.0	100.0	100.0	100.0	100.0

apls:DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopment us-gaap:IncomeTaxAuthority

apls:DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopment

us-gaap:DomesticCountry

Period End	2020-12-31	2019-12-31	2018-12-31
Value	34	24	14
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopment	100.0	100.0	100.0

us-gaap:StateAndLocalJurisdiction

Period End	2020-12-31
Value	6.5
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearchAndDevelopment	19.0

apls:DeferredTaxLiabilitiesSection481AAdjustment

Period End	2020-12-31	2019-12-31
Value	1935000.0	2891000.0
Percentage of DeferredTaxLiabilitiesSection481AAdjustment	100.0	100.0

apls:DevelopmentDerivativeLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31
Value	14	6.212	4.23
Percentage of DevelopmentDerivativeLiabilitiesCurrent	100.0	100.0	100.0

apls:DevelopmentDerivativeLiabilitiesCurrent us-gaap:TypeOfArrangement

apls:SFJAgreement

Period End	2021-06-30	2021-03-31	2020-12-31
Value	14	6.2	4.2
Percentage of DevelopmentDerivativeLiabilitiesCurrent	99.9	99.8	99.3

apls:DevelopmentDerivativeLiabilitiesGross

Period End	2021-06-30	2021-03-31	2020-12-31	2020-06-30	2020-03-31	2019-12-31
Value	292	274	257	220	223	134
Percentage of DevelopmentDerivativeLiabilitiesGross	100.0	100.0	100.0	100.0	100.0	100.0

apls:DevelopmentDerivativeLiabilitiesNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	278	268	253	217	220	223	134	130	109	60
Percentage of DevelopmentDerivativeLiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

apls:DevelopmentDerivativeLiabilitiesNoncurrent us-gaap:TypeOfArrangement

apls:SFJAgreement

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30
Value	292	275	257	217	220	223	134	130
Percentage of DevelopmentDerivativeLiabilitiesNoncurrent	105.1	102.3	101.7	100.0	100.0	100.0	100.0	100.0

apls:EstimatedTerminationCostsAndOtherFees

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	4300000.0	3200000.0	2800000.0	2100000.0
Percentage of EstimatedTerminationCostsAndOtherFees	100.0	100.0	100.0	100.0

apls:LesseeOperatingLeaseLiabilityPaymentsDueYearFiveAndThereafter

Period End	2020-12-31
Value	3745000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFiveAndThereafter	100.0

apls:LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndThereafter

Period End	2021-06-30	2021-03-31	2020-09-30
Value	9267000.0	9267000.0	7846000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndThereafter	100.0	100.0	100.0

apls:NetDeferredTaxAssetsBeforeValuationAllowance

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	397	156	79	41
Percentage of NetDeferredTaxAssetsBeforeValuationAllowance	100.0	100.0	100.0	100.0

apls:OperatingLeaseArea us-gaap:StatementGeographical, us-gaap:TypeOfArrangement

apls:OperatingLeaseArea

apls:WalthamMassachusetts, apls:AmendedWalthamOfficeSpaceLease

Period End	2020-12-31
Value	16401.0
Percentage of OperatingLeaseArea	100.0

apls:OperatingLeaseSquareFeetOfOfficeSpaceLeased us-gaap:StatementGeographical, us-gaap:TypeOfArrangement

apls:OperatingLeaseSquareFeetOfOfficeSpaceLeased

apls:WalthamMassachusetts, apls:AmendedWalthamOfficeSpaceLease

Period End	2020-12-31
Value	77818.0
Percentage of OperatingLeaseSquareFeetOfOfficeSpaceLeased	100.0

apls:PrepaidResearchAndDevelopmentCostCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	14	14	8.0	18	23	4.1
Percentage of PrepaidResearchAndDevelopmentCostCurrent	100.0	100.0	100.0	100.0	100.0	100.0

apls:ProductSalesReserves us-gaap:BalanceSheetLocation

apls:ProductSalesReserves

apls:AccruedLiabilitiesCurrent

Period End	2021-06-30
Value	100000.0
Percentage of ProductSalesReserves	100.0

apls:RoyaltyExpenseOwed us-gaap:TypeOfArrangement

apls:RoyaltyExpenseOwed

apls:SobiAgreementAndAnotherLicensingTransaction

Period End	2020-12-31
Value	25
Percentage of RoyaltyExpenseOwed	100.0

apls:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodAggregateIntrinsicValue

Period End	2020-12-31	2019-12-31	2018-12-31
Value	38	15	5.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodAggregateIntrinsicValue	100.0	100.0	100.0

apls:UnrecognizedUpfrontPayment us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

apls:UnrecognizedUpfrontPayment

apls:BeamTherapeuticsIncorporation, apls:ResearchCollaborationAgreement

Period End	2021-06-30
Value	25
Percentage of UnrecognizedUpfrontPayment	100.0

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

us-gaap:AssetsFairValueDisclosure

us-gaap:CertificatesOfDeposit, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	43	43	43	40	40	40
Percentage of AssetsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	214	213	427	271	273	256	281	92
Percentage of AssetsFairValueDisclosure	492.5	489.1	981.1	664.3	670.0	627.5	0.0	0.0

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

apls:MarketableSecurities, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	311	292	495	228
Percentage of AssetsFairValueDisclosure	753.1	1051.4	715.7	716.8	1214.0	560.7

us-gaap:CashAndCashEquivalents, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2020-12-31	2020-03-31
Value	89	117
Percentage of AssetsFairValueDisclosure	206.5	287.1

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

apls:MarketableSecurities, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentCorporationsAndAgenciesSecurities

Period End	2020-09-30	2020-06-30
Value	19	19
Percentage of AssetsFairValueDisclosure	49.0	49.0

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

us-gaap:CertificatesOfDeposit, us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	43	43	43	40	40	40
Percentage of AssetsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	214	213	427	271	273	256	281	92
Percentage of AssetsFairValueDisclosure	492.5	489.1	981.1	664.3	670.0	627.5	0.0	0.0

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

apls:MarketableSecurities, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	311	292	495	228
Percentage of AssetsFairValueDisclosure	753.1	1051.4	715.7	716.8	1214.0	560.7

us-gaap:CashAndCashEquivalents, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2020-12-31	2020-03-31
Value	89	117
Percentage of AssetsFairValueDisclosure	206.5	287.1

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

apls:MarketableSecurities, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentCorporationsAndAgenciesSecurities

Period End	2020-09-30	2020-06-30
Value	19	19
Percentage of AssetsFairValueDisclosure	49.0	49.0

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	258	256	471	311	314	296	281	92
Percentage of AssetsFairValueDisclosure	592.5	589.1	1081.1	764.3	770.0	727.5	0.0	0.0

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	401	312	515	345
Percentage of AssetsFairValueDisclosure	753.1	1051.4	922.2	765.8	1262.9	847.8

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	258	256	471	311	314	296	281	92
Percentage of AssetsFairValueDisclosure	592.5	589.1	1081.1	764.3	770.0	727.5	0.0	0.0

us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	401	312	515	345
Percentage of AssetsFairValueDisclosure	753.1	1051.4	922.2	765.8	1262.9	847.8

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	36000.0	79000.0	11000.0	122000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	100.0	100.0	100.0	100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2020-12-31
Value	19000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	328	458	311	312
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis	100.0	100.0	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:USGovernmentAgenciesDebtSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	328	458	311	312	515	228
Percentage of AvailableForSaleSecuritiesDebtSecurities	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:PlanName

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

apls:TwoThousandSeventeenStockIncentivePlan

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	8.613	6.319001	4.03239	1.682596
Percentage of CommonStockCapitalSharesReservedForFutureIssuance	100.0	100.0	100.0	100.0

us-gaap:ConvertibleDebt us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:ConvertibleDebt

apls:AccountingStandardsUpdate202006

Period End	2021-01-01
Value	149
Percentage of ConvertibleDebt	100.0

us-gaap:ConvertibleDebt us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:DebtInstrument

apls:AccountingStandardsUpdate202006, apls:TwoThousandNineteenConvertibleNotes

Period End	2021-01-01
Value	74
Percentage of ConvertibleDebt	50.0

apls:AccountingStandardsUpdate202006, apls:TwoThousandTwentyConvertibleNotes

Period End	2021-01-01
Value	95
Percentage of ConvertibleDebt	63.8

us-gaap:ConvertibleDebtNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	386	386	358	353	348	144	142
Percentage of ConvertibleDebtNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

us-gaap:DebtInstrumentConvertibleConversionPrice1

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	39.462	39.462	39.462	39.46
Percentage of DebtInstrumentConvertibleConversionPrice1	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	520	353	348	220	220
Percentage of DebtInstrumentFaceAmount	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredFinanceCostsGross us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsGross

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	7400000.0	7700000.0	7800000.0	8000000.0
Percentage of DeferredFinanceCostsGross	100.0	100.0	100.0	100.0

us-gaap:DeferredFinanceCostsNet us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsNet

apls:AccountingStandardsUpdate202006, apls:TwoThousandNineteenConvertibleNotes

Period End	2021-01-01
Value	2400000.0
Percentage of DeferredFinanceCostsNet	100.0

apls:AccountingStandardsUpdate202006, apls:TwoThousandTwentyConvertibleNotes

Period End	2021-01-01
Value	2300000.0
Percentage of DeferredFinanceCostsNet	95.8

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

apls:TwoThousandNineteenConvertibleNotes, apls:ConvertibleSeniorNotesDueTwoThousandTwentySix, apls:ExchangeAgreements

Period End	2021-01-31
Value	3300000.0
Percentage of DeferredFinanceCostsNet	0.0

us-gaap:DeferredIncomeTaxLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31
Value	12	14	2.475809
Percentage of DeferredIncomeTaxLiabilities	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsDerivativeInstruments

Period End	2020-12-31	2019-12-31
Value	68	35
Percentage of DeferredTaxAssetsDerivativeInstruments	100.0	100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	162	0.015519	0.019616	0.023543	0.041166
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	409	171	81	41	30
Percentage of DeferredTaxAssetsGross	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

Period End	2020-12-31	2019-12-31	2018-12-31	2018-03-31	2017-12-31	2016-12-31
Value	122	102	64	36	30	22
Percentage of DeferredTaxAssetsOperatingLossCarryforwards	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration

us-gaap:DomesticCountry

Period End	2020-12-31
Value	276
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	100.0

us-gaap:DeferredTaxAssetsOther

Period End	2020-12-31	2019-12-31
Value	207000.0	11000.0
Percentage of DeferredTaxAssetsOther	100.0	100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

Period End	2020-12-31	2019-12-31	2018-12-31	2018-03-31	2017-12-31	2017-09-30	2016-12-31
Value	24	14	7.269624	9.55351	3.357291	2.243565	1.347804
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	11	6.624638	2.914583	1.826372	1.000887
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

Period End	2020-12-31	2019-12-31	2017-12-31	2016-12-31
Value	4520000.0	2259000.0	345620.0	914630.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesFinancingArrangements

Period End	2020-12-31	2019-12-31
Value	10	11
Percentage of DeferredTaxLiabilitiesFinancingArrangements	100.0	100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

Period End	2020-12-31
Value	23000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment	100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	100	79	27	10	2.91087	1.67311
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31
Value	16
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	16.2

us-gaap:FinancialLiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency

us-gaap:FinancialLiabilitiesFairValueDisclosure

us-gaap:FairValueInputsLevel3, apls:ConvertibleSeniorNotes, us-gaap:FairValueMeasurementsNonrecurring

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	370	378	155	149
Percentage of FinancialLiabilitiesFairValueDisclosure	100.0	100.0	100.0	100.0

us-gaap:FairValueInputsLevel3, apls:DevelopmentDerivativeLiability, us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	292	274	257	217	220	223	134
Percentage of FinancialLiabilitiesFairValueDisclosure	0.0	0.0	0.0	58.7	58.2	144.0	90.2

us-gaap:FinancialLiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	370	378	155	149
Percentage of FinancialLiabilitiesFairValueDisclosure	100.0	100.0	100.0	100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	292	274	257	217	220	223	134
Percentage of FinancialLiabilitiesFairValueDisclosure	0.0	0.0	0.0	58.7	58.2	144.0	90.2

us-gaap:FinancialLiabilitiesFairValueDisclosure us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency

apls:ConvertibleSeniorNotes, us-gaap:FairValueMeasurementsNonrecurring

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	370	378	155	149
Percentage of FinancialLiabilitiesFairValueDisclosure	100.0	100.0	100.0	100.0

apls:DevelopmentDerivativeLiability, us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	292	274	257	217	220	223	134
Percentage of FinancialLiabilitiesFairValueDisclosure	0.0	0.0	0.0	58.7	58.2	144.0	90.2

us-gaap:FinancialLiabilitiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	370	378	155	149	26
Percentage of FinancialLiabilitiesFairValueDisclosure	100.0	100.0	100.0	100.0	0.0

us-gaap:FairValueMeasurementsRecurring

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	292	274	257	217	220	223	134	0.158783
Percentage of FinancialLiabilitiesFairValueDisclosure	0.0	0.0	0.0	58.7	58.2	144.0	90.2	0.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	5562000.0	5415000.0	4962000.0	4759000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	100.0	100.0	100.0	100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

Period End	2021-06-30	2021-03-31	2020-09-30
Value	2874000.0	4204000.0	1223000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	100.0	100.0	100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31
Value	7.71	7.76	7.74	7.84	0.083	0.0832	0.0819
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	358	392	251	118
Percentage of OperatingLossCarryforwards	100.0	100.0	100.0	100.0

us-gaap:ForeignCountry

Period End	2020-12-31
Value	240
Percentage of OperatingLossCarryforwards	67.3

us-gaap:StateAndLocalJurisdiction

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	405	358	254	118
Percentage of OperatingLossCarryforwards	113.1	91.2	101.3	100.0

us-gaap:PrepaidExpenseCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31
Value	18	17	11	11	17	22	19	14	13	20	24	16	10	8.121602	5.059593	1.132438
Percentage of PrepaidExpenseCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedCash

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	1572000.0	1552000.0	1266000.0	1255000.0	1248000.0	1016000.0
Percentage of RestrictedCash	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedCashCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	1572000.0	1552000.0	1266000.0	1255000.0	1248000.0	1016000.0
Percentage of RestrictedCashCurrent	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-12-31
Value	38.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

Period End	2020-12-31	2017-12-31	2017-09-30	2016-12-31	2015-12-31
Value	10.96	3.67	2.7	2.56	2.43
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

Period End	2020-12-31	2017-12-31	2015-12-31
Value	166	50	0.812365
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

Period End	2020-12-31	2017-12-31	2016-12-31	2015-12-31
Value	27.85	5.88	3.16	3.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0	100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

Period End	2020-12-31	2017-12-31	2016-12-31	2015-12-31
Value	280	56	0.243	2.058419
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	100.0	100.0	100.0	100.0

Line plots across dimensions of each concept

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)

TTM Greenblatt ROC
_
(None,)

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)

APLS

Table of contents

Plots across concepts

Tables

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

apls:ConvertibleNotes

us-gaap:EmployeeStockOption

us-gaap:RestrictedStockUnitsRSU

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense

Interest Expense

us-gaap:InterestExpense us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:InterestExpense

apls:AccountingStandardsUpdate202006

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

apls:ConvertibleSeniorNotesDueTwoThousandTwentySix

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

us-gaap:AccumulatedTranslationAdjustment

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense