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Comprehensive income (loss) - Reclassifications from accumulated other comprehensive loss (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Comprehensive loss    
Balance at the beginning $ 25,703 $ 18,773
Balance at the end 27,561 18,418
Pension Liability Adjustment    
Comprehensive loss    
Balance at the beginning (412) (86)
Total other comprehensive loss before reclassifications, net of taxes (412) (86)
Net amount reclassified to earnings (1) (5)
Balance at the end (413) (91)
Fair Value of Derivatives    
Comprehensive loss    
Balance at the beginning 41 (365)
Other comprehensive income (loss) before reclassifications, net of taxes (13) 242
Total other comprehensive loss before reclassifications, net of taxes 28 (123)
Net amount reclassified to earnings (21) 181
Balance at the end 7 58
Foreign Currency Translation Adjustment    
Comprehensive loss    
Balance at the beginning (1,250) (1,657)
Other comprehensive income (loss) before reclassifications, net of taxes (130) 60
Total other comprehensive loss before reclassifications, net of taxes (1,380) (1,597)
Balance at the end (1,380) (1,597)
Accumulated Other Comprehensive Loss    
Comprehensive loss    
Balance at the beginning (1,621) (2,108)
Other comprehensive income (loss) before reclassifications, net of taxes (143) 302
Total other comprehensive loss before reclassifications, net of taxes (1,764) (1,806)
Net amount reclassified to earnings (22) 176
Balance at the end $ (1,786) $ (1,630)