Segment Information - Schedule of the Reportable Segment and Includes the Reconciliation to Consolidated Net Loss (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Revenue | $ 259,691 | $ 170,992 | $ 669,269 | $ 442,497 | ||||||||||||
| Cost of revenue (excluding amortization and depreciation) | 17,804 | 11,912 | 46,093 | 35,149 | ||||||||||||
| Other research and development | 3,258 | 4,744 | [1] | 20,316 | 11,942 | [1] | ||||||||||
| General and administrative expense (excluding share-based compensation expense) | 17,660 | 19,739 | 64,299 | 44,623 | ||||||||||||
| Selling and marketing expense (excluding stock-based compensation expense) | 166,701 | 114,200 | 477,251 | 305,864 | ||||||||||||
| Stock-based compensation expense | 26,356 | 23,103 | 76,942 | 71,022 | ||||||||||||
| Loss (Gain) in fair value of contingent consideration | (2,380) | 13,185 | (3,286) | 6,595 | ||||||||||||
| Interest expense, net | 1,721 | 1,120 | [2] | 4,446 | 5,385 | [2] | ||||||||||
| Other segment items | 1,695 | 1,607 | [3] | 4,984 | 14,193 | [3] | ||||||||||
| Segment net loss | (12,877) | (47,229) | (128,733) | (154,615) | ||||||||||||
| Reconciliation of net loss | ||||||||||||||||
| Adjustments and reconciling items | 0 | 0 | 0 | 0 | ||||||||||||
| Net loss | (12,877) | $ (51,314) | $ (64,542) | (47,229) | $ (47,973) | $ (59,413) | (128,733) | (154,615) | ||||||||
| Solriamfetol | ||||||||||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Research and development expense (reversal) recognized | 16,471 | 9,518 | 41,099 | 32,094 | ||||||||||||
| AXS-05 | ||||||||||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Research and development expense (reversal) recognized | 12,974 | 13,855 | 35,369 | 42,896 | ||||||||||||
| AXS-07 | ||||||||||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Research and development expense (reversal) recognized | 4,793 | 4,825 | 14,847 | 15,379 | ||||||||||||
| AXS-12 | ||||||||||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Research and development expense (reversal) recognized | 2,013 | 1,873 | 5,900 | 6,019 | ||||||||||||
| AXS-14 | ||||||||||||||||
| Segment Reporting [Line Items] | ||||||||||||||||
| Research and development expense (reversal) recognized | $ 3,502 | $ (1,460) | $ 9,742 | $ 5,951 | ||||||||||||
| ||||||||||||||||
| X | ||||||||||
- Definition Adjustments and reconciling items. No definition available.
|
| X | ||||||||||
- Definition Change in fair value of contingent considerations. No definition available.
|
| X | ||||||||||
- Definition Research and development expense (reversal). No definition available.
|
| X | ||||||||||
- Definition Cost of product sold and service rendered, excluding depreciation, depletion, and amortization. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of other research and development expense. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of other expense (income) and loss (gain) calculated as difference between segment revenue and separately disclosed expense category to arrive at segment profit (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The aggregate total amount of expenses directly related to the marketing or selling of products or services. No definition available.
|
| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|