XML 66 R51.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Development Liability - Summary of Development Liability (Detail) - SFJ Agreement [Member] - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |
Development liability | $ 366,000 | $ 421,500
Less: Unamortized discount to development liability | (50,353) | (76,349)
Less: Current portion of development liability, net of discount | (75,830) | (29,504)
Total long term development liability | $ 239,817 | $ 315,647
Effective Interest Rate | 7.91% | 7.91%

X
- Definition Development derivative liabilities. + References No definition available. + Details
Name: | apls_DevelopmentDerivativeLiabilities
Namespace Prefix: | apls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Development derivative liabilities current. + References No definition available. + Details
Name: | apls_DevelopmentDerivativeLiabilitiesCurrent
Namespace Prefix: | apls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Development derivative liabilities, interest rate, effective percentage. + References No definition available. + Details
Name: | apls_DevelopmentDerivativeLiabilitiesInterestRateEffectivePercentage
Namespace Prefix: | apls_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Development derivative liabilities noncurrent. + References No definition available. + Details
Name: | apls_DevelopmentDerivativeLiabilitiesNoncurrent
Namespace Prefix: | apls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Development derivative liabilities, unamortized discount. + References No definition available. + Details
Name: | apls_DevelopmentDerivativeLiabilitiesUnamortizedDiscount
Namespace Prefix: | apls_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479402/808-10-50-1 + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=apls_SFJAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |