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Income taxes, Components of income tax expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Current [Abstract]    
Federal $ (154) $ (1)
State 37 51
Foreign 108 85
Income taxes current (9) 135
Deferred [Abstract]    
Federal 5,991 825
State 293 132
Foreign 20 63
Income taxes deferred 6,304 1,020
Income tax expense $ 6,295 $ 1,155
Effective tax rate (176.40%) 19.60%
Income taxes [Abstract]    
Foreign income before taxes $ 79 $ 322
Federal [Member]    
Income taxes [Abstract]    
Net operating loss carryforwards not subject to expiration 276  
State [Member]    
Income taxes [Abstract]    
Net operating loss carryforwards subject to expiration 135  
Tax credit carryforwards subject to expiration 0  
R&D Credit [Member]    
Income taxes [Abstract]    
Tax credit carryforwards subject to expiration $ 903  
Tax credit carryforwards expiration period 20 years