Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Earnings per share [Abstract]
Net income (loss)	$ (62)	$ 906	$ 765	$ 3,139	$ 260	$ 528	$ (2,376)	$ (4,348)	$ 4,748	$ (5,936)
Shares [Abstract]
Basic: Weighted average common shares outstanding (in shares)									9,951	9,905
Add: Dilutive effect of outstanding equity awards as determined by the treasury stock method (in shares)									70	0
Diluted: Weighted average common and common equivalent shares outstanding (in shares)									10,021	9,905
Net income (loss) per common share [Abstract]
Basic (in dollars per share)	$ (0.01)	$ 0.09	$ 0.08	$ 0.32	$ 0.03	$ 0.05	$ (0.24)	$ (0.44)	$ 0.48	$ (0.6)
Diluted (in dollars per share)	$ (0.01)	$ 0.09	$ 0.08	$ 0.31	$ 0.03	$ 0.05	$ (0.24)	$ (0.44)	$ 0.47	$ (0.6)
Stock Awards [Member]
Earnings per share [Abstract]
Anti-dilutive securities excluded from computation of earnings per dilutive share (in shares)									1,100	1,500