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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
United States statutory tax rate $ 3,484    
State and local income taxes, net of federal income tax effect (307)    
Innovation income deduction 702    
Federal research credits 4,247    
Other 150    
Changes in valuation allowances (1,901)    
Meals and entertainment (195)    
Stock-based compensation (1,700)    
Non-deductible executive compensation (824)    
Income from branch (288)    
Other (125)    
Changes in unrecognized tax benefits (284)    
Income tax benefit $ 3,679 $ 2,429 $ 2,960
Percent      
Federal tax rate 21.00% 21.00% 21.00%
State tax rate - statutory blended rate (1.80%) 4.20% 4.30%
Foreign rate differential   5.40% 2.80%
Innovation income deduction 4.20%    
Other   1.40% 1.20%
Research tax benefits 25.60% 49.40% 24.40%
Other 0.90%    
Change in valuation allowance (11.50%) (22.80%) (11.70%)
Stock-based compensation (1.20%)    
Stock-based compensation (10.20%) 1.20% (18.00%)
Non-deductible executive compensation (5.00%)    
Income from branch (0.017)    
Other (0.80%)    
Changes in unrecognized tax benefits (1.70%)    
Total 22.20% 27.10% 15.30%
Belgium:      
Amount      
Effect of rates different than statutory $ 297    
Other $ (28)    
Percent      
Foreign rate differential 1.80%    
Other (0.20%)    
Ireland:      
Amount      
Other $ (40)    
Percent      
Other (0.20%)    
United Kingdom:      
Amount      
Effect of rates different than statutory $ 323    
Other $ (69)    
Percent      
Foreign rate differential 1.90%    
Other (0.40%)    
United States      
Amount      
Other $ 122    
Percent      
Other 0.80%    
Other foreign jurisdictions      
Amount      
Effect of rates different than statutory $ 115    
Percent      
Foreign rate differential 0.70%