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Earnings per share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings per share [Abstract]        
Net (loss) income $ (319) $ 765 $ (1,355) $ 3,904
Shares [Abstract]        
Basic: Weighted average common shares outstanding (in shares) 9,997,000 9,956,000 9,985,000 9,943,000
Add: Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method (in shares) 0 61,000 0 73,000
Diluted: Weighted average common and common equivalent shares outstanding (in shares) 9,997,000 10,017,000 9,985,000 10,016,000
Net (loss) income per common share [Abstract]        
Basic (in dollars per share) $ (0.03) $ 0.08 $ (0.14) $ 0.39
Diluted (in dollars per share) $ (0.03) $ 0.08 $ (0.14) $ 0.39
Stock Awards [Member]        
Earnings per share [Abstract]        
Anti-dilutive securities excluded from computation of earnings per dilutive share (in shares) 1,600 900 1,500 900