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Earnings per share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings per share [Abstract]        
Net loss $ (143) $ (319) $ (124) $ (1,355)
Shares [Abstract]        
Basic: Weighted average common shares outstanding (in shares) 10,085,000 9,997,000 10,064,000 9,985,000
Add: Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method (in shares) 0 0 0 0
Diluted: Weighted average common and common equivalent shares outstanding (in shares) 10,085,000 9,997,000 10,064,000 9,985,000
Net loss per common share [Abstract]        
Basic (in dollars per share) $ (0.01) $ (0.03) $ (0.01) $ (0.14)
Diluted (in dollars per share) $ (0.01) $ (0.03) $ (0.01) $ (0.14)
Stock Awards [Member]        
Earnings per share [Abstract]        
Anti-dilutive securities excluded from computation of earnings per dilutive share (in shares) 1,800 1,600 1,700 1,500