XML 36 R29.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Long-term Debt (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Debt Disclosure [Abstract] |
Schedule of Outstanding Balance of Convertible Notes | The outstanding balance of the Convertible Notes as of March 31, 2024 and December 31, 2023 consisted of the following (in thousands):
|  | March 31, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Liability |  |  |  |  |  |
Principal |  |  | 93,897 |  |  |  | 93,897 |
Less: debt discount and issuance costs, net |  |  | (788 | ) |  |  | (864 | )
Net carrying amount |  | $ | 93,109 |  |  | $ | 93,033 |
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, 2024 and 2023 (in thousands):
| Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
Amortization of debt issuance costs |  |  | 76 |  |  |  | 73 |
Contractual interest expense |  |  | 822 |  |  |  | 822 |
Total interest expense |  | $ | 898 |  |  | $ | 895 |
Schedule of Future Minimum Payments on Convertible Notes Payable | Future minimum payments on Convertible Notes payable as of March 31, 2024 are as follows (in thousands):
2024 |  |  | $ |  | 2,465 |
2025 |  |  |  |  | 3,286 |
2026 |  |  |  |  | 96,225 |
Total future minimum payments |  |  |  |  | 101,976 |
Less: interest |  |  |  |  | (8,079 | )
Less: debt discount and issuance costs, net |  |  |  |  | (788 | )
Less: current portion |  |  |  |  | — |
Convertible senior notes |  |  |  |  | 93,109 |

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
- 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 maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 470 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481544/470-10-50-1 + Details
Name: | us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration