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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Deferred tax assets:    
Net operating loss and credit carryforwards $ 178,709 $ 150,372
Stock-based compensation 6,850 6,636
Operating lease liability 5,156 9,551
Accrued expenses 82 168
Deferred revenue 125 203
Equity method investment 1,213 3,875
R&D capitalization 26,752 38,517
Other 1,383 4,357
Total deferred tax assets 220,270 213,679
Valuation allowance (215,942) (205,566)
Total net deferred tax asset 4,328 8,113
Deferred tax liabilities:    
Operating lease asset (4,328) (8,113)
Other 0 0
Total deferred tax liabilities (4,328) (8,113)
Net deferred income tax assets and liabilities $ 0 $ 0