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Income taxes, Statutory to effective tax rate reconciliation (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Effective Tax Rate Reconciliation [Abstract]    
Federal statutory tax rate 21.00% 21.00%
R&D credit 8.80% (5.90%)
Foreign-derived intangible income deduction 0.00% (1.70%)
Stock award excess tax benefit (0.70%) 0.40%
State income taxes, net of federal income taxes 1.00% 2.50%
Business meals and entertainment (0.40%) 0.30%
Executive compensation limitation 0.00% 0.60%
Uncertain tax positions (0.20%) 0.50%
Stock option cancellations (2.00%) 0.60%
Change in valuation allowance (206.90%) 1.00%
Other 3.00% 0.30%
Effective tax rate (176.40%) 19.60%