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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets:    
Net operating loss carryforward $ 324,175 $ 320,998
Research and development credits 59,168 59,417
Section 174 capitalized research and development 25,117 28,822
Stock-based compensation 5,323 15,413
Lease liabilities 762 1,471
Other 5,262 5,005
Total gross deferred tax assets 419,807 431,126
Deferred tax liabilities:    
Right-of-use lease assets (699) (1,362)
Total gross deferred tax liabilities (699) (1,362)
Valuation allowance $ (419,108) $ (429,764)