XML 99 R79.htm IDEA: XBRL DOCUMENT v3.25.4
Income taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Tax Expense    
U.S. federal statutory tax rate $ (19,552)  
State income taxes - net of federal income tax benefits $ (2)  
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] District of Columbia, South Carolina  
Tax credits    
Research and development credit $ (903)  
Stock-based compensation (429)  
Mark-to-market warrant liabilities 1,081  
Other 667  
Changes in unrecognized tax benefits 226  
Total income tax expense $ (8) $ 1,194
Tax Jurisdiction of Domicile [Extensible Enumeration] US  
Effective Tax Rate    
U.S. federal statutory tax rate 21.00% 21.00%
State income taxes - net of federal income tax benefits 0.82%
Foreign withholding taxes   (1.25%)
Global tax rate differential   (0.21%)
Permanent differences   (2.17%)
Tax credits    
Research and development credit 0.97%  
Changes in valuation allowances   (21.79%)
Stock-based compensation 0.46%  
Mark-to-market warrant liabilities (1.16%)  
Other (0.72%)  
Research and development   4.08%
Changes in unrecognized tax benefits (0.24%)  
Other adjustments   (1.74%)
Total income tax expense 0.01% (1.26%)
US    
Tax credits    
Changes in valuation allowances $ 16,772  
Other adjustments $ 577  
Tax credits    
Changes in valuation allowances (18.01%)  
Other adjustments (0.62%)  
Republic of Korea    
Tax credits    
Changes in valuation allowances $ 2,400  
Other adjustments $ (845)  
Tax credits    
Changes in valuation allowances (2.58%)  
Other adjustments 0.91%