Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings per share [Abstract]
Net income (loss)	$ 906	$ 528	$ 4,810	$ (6,196)
Shares [Abstract]
Basic: Weighted average common shares outstanding (in shares)	9,958	9,911	9,948	9,902
Add: Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method (in shares)	94	0	75	0
Diluted: Weighted average common and common equivalent shares outstanding (in shares)	10,052	9,911	10,023	9,902
Net income (loss) per common share [Abstract]
Basic (in dollars per share)	$ 0.09	$ 0.05	$ 0.48	$ (0.63)
Diluted (in dollars per share)	$ 0.09	$ 0.05	$ 0.48	$ (0.63)
Stock Awards [Member]
Earnings per share [Abstract]
Anti-dilutive securities excluded from computation of earnings per dilutive share (in shares)				1,600