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Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2024
Deferred tax assets |  |  |
Net operating loss carryforwards | $ 85,734 |  | $ 93,650
Tax credit carryforwards | 14,576 |  | 19,719
Capitalized research and development | 16,927 |  | 31,719
Capitalized licenses | 4,041 |  | 3,714
Capitalized legal expenses | 918 |  | 816
Lease liability | 90 |  | 1,442
Other differences | 2,587 |  | 3,846
Total gross deferred tax assets | 124,873 |  | 154,906
Less valuation allowance | (124,774) |  | (153,529)
Net deferred tax assets | 99 |  | 1,377
Deferred tax liabilities |  |  |
ROU asset | (99) |  | (1,377)
Net deferred taxes | 0 |  | 0
Deferred tax assets research and development | 16,900 |  | $ 31,700
Increase in valuation allowance | $ 28,800 | $ 21,100 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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