XML 37 R27.htm IDEA: XBRL DOCUMENT
v3.25.1

Long-term Debt (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Debt Disclosure [Abstract] |
Schedule of Outstanding Balance of Convertible Notes | The outstanding balance of the Convertible Notes as of March 31, 2025 and December 31, 2024 consisted of the following (in thousands):
|  | March 31, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Principal |  | $ | 93,897 |  |  | $ | 93,897 |
Less: debt discount and issuance costs, net |  |  | (476 | ) |  |  | (556 | )
Net carrying amount |  | $ | 93,421 |  |  | $ | 93,341 |
Schedule of Interest Expense Recognized Related to Convertible Notes | The following table sets forth total interest expense recognized related to the Convertible Notes during the three months ended March 31, 2025 and 2024 (in thousands):
| Three Months Ended March 31, |
|  | 2025 |  |  | 2024 |
Amortization of debt issuance costs |  | $ | 79 |  |  | $ | 76 |
Contractual interest expense |  |  | 822 |  |  |  | 822 |
Total interest expense |  | $ | 901 |  |  | $ | 898 |
Summary of Credit Facility | The outstand ing balance of the Credit Facility as of March 31, 2025 and December 31, 2024 consisted of the following (in thousands):
|  | March 31, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Principal |  | $ | 375,000 |  |  | $ | 375,000 |
Less: debt discount and issuance costs |  |  | (14,999 | ) |  |  | (15,511 | )
Net carrying amount |  | $ | 360,001 |  |  | $ | 359,489 |
Summary of Interest Expense Recognized Related to Credit Facility | The following table sets forth total interest expense recognized related to the Credit Facility during the three months ended March 31, 2025 and 2024 (in thousands):
|  | Three Months Ended March 31, |
|  | 2025 |  |  | 2024 |
Amortization of debt issuance costs |  | $ | 512 |  |  | $ | — |
Contractual interest expense |  |  | 9,449 |  |  |  | — |
Total interest expense |  | $ | 9,961 |  |  | $ | — |

X
- Definition Schedule of interest expense related to debt instruments. + References No definition available. + Details
Name: | apls_ScheduleOfInterestExpenseRelatedToDebtInstrumentsTableTextBlock
Namespace Prefix: | apls_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of interest expense recognized related to credit facility. + References No definition available. + Details
Name: | apls_SummaryOfInterestExpenseRecognizedRelatedToCreditFacilityTableTextBlock
Namespace Prefix: | apls_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration