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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