Segment Reporting - Summary of Reconciliation to Net Loss (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|||||
| Segment expenses: | ||||||||||
| Total operating expenses | $ 43,128,000 | $ 27,186,000 | $ 74,004,000 | $ 63,750,000 | ||||||
| Reconciling items: | ||||||||||
| Depreciation and amortization | (2,732,000) | (2,331,000) | (5,072,000) | (4,630,000) | ||||||
| Share-based compensation | (1,865,000) | (2,053,000) | (3,763,000) | (4,887,000) | ||||||
| Impairment of property and equipment | (5,670,000) | 0 | (5,670,000) | 0 | ||||||
| Impairment of right-of-use asset | (2,378,000) | 0 | (2,378,000) | 0 | ||||||
| Interest income | 2,538,000 | 3,970,000 | 5,376,000 | 8,346,000 | ||||||
| Other income, net | 222,000 | 239,000 | 428,000 | 444,000 | ||||||
| Net loss | (40,368,000) | $ (27,832,000) | (22,977,000) | $ (31,983,000) | (68,200,000) | (54,960,000) | ||||
| Segment | ||||||||||
| Segment expenses: | ||||||||||
| Personnel related expenses, excluding share-based compensation | [1] | 8,628,000 | 7,718,000 | 17,395,000 | 23,615,000 | |||||
| Facilities expenses | 4,476,000 | 4,771,000 | 8,869,000 | 9,336,000 | ||||||
| Direct external development program expenses | 10,997,000 | 4,850,000 | 18,476,000 | 10,270,000 | ||||||
| Other segment expenses | [2] | 6,382,000 | 5,463,000 | 12,381,000 | 11,012,000 | |||||
| Total operating expenses | 30,483,000 | 22,802,000 | 57,121,000 | 54,233,000 | ||||||
| Reconciling items: | ||||||||||
| Net loss | $ (30,483,000) | $ (22,802,000) | $ (57,121,000) | $ (54,233,000) | ||||||
| ||||||||||
| X | ||||||||||
- Definition Direct external development program expenses. No definition available.
|
| X | ||||||||||
- Definition Facilities expenses. No definition available.
|
| X | ||||||||||
- Definition Personnel related expenses, excluding share-based compensation. No definition available.
|
| X | ||||||||||
- Definition Segment expenses abstract. No definition available.
|
| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. 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 Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of loss from impairment of right-of-use asset from operating lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of expense classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References 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
|