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Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Income Taxes [Line Items]    
Foreign earnings repatriated $ 0 $ 0
Deferred income taxes 0 0
Income tax expense $ 0 $ 0
Effective tax rate 0.00% 0.00%
Statutory tax rate 21.00% 21.00%
Tax losses and credits carried forward $ 561,099,000 $ 456,014,000
Net operating loss carryforwards, subject to expiration 155,787,000 148,511,000
Net operating loss carryforwards, not subject to expiration 370,202,000 272,391,000
Valuation allowance 215,942,000 205,566,000
Deferred income tax 0 0
Accrued interest and penalties 0 0
Domestic | United States    
Income Taxes [Line Items]    
Tax losses and credits carried forward 469,278,000 376,507,000
State and local    
Income Taxes [Line Items]    
Tax losses and credits carried forward 41,833,000 34,019,000
Foreign    
Income Taxes [Line Items]    
Tax losses and credits carried forward 49,481,000 45,456,000
R&D tax credits    
Income Taxes [Line Items]    
Tax credits $ 35,111,000 $ 35,111,000