Net (loss) income per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of the weighted average shares outstanding for the basic and diluted EPS computations [Abstract]
Net (loss) income from continuing operations	$ (1,517)	$ 518	$ 1,724	$ 634
Basic [Abstract]
Shares outstanding at beginning of period (in shares)	15,907,000	15,770,000	15,771,000	15,645,000
Weighted average shares issued during the period, net	69,000	0	178,000	25,000
Weighted average common shares, basic (in shares)	15,976,000	15,770,000	15,949,000	15,670,000
Net (loss) income from continuing operations per common share, basic (in dollars per share)	$ (0.10)	$ 0.03	$ 0.11	$ 0.04
Diluted [Abstract]
Weighted average common shares, basic (in shares)	15,976,000	15,770,000	15,949,000	15,670,000
Dilutive impact of stock options and restricted stock awards (in shares)	0	52,000	311,000	60,000
Weighted average common shares, diluted (in shares)	15,976,000	15,822,000	16,260,000	15,730,000
Net (loss) income from continuing operations per common share, diluted (in dollars per share)	$ (0.10)	$ 0.03	$ 0.11	$ 0.04
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options outstanding (in shares)	0	914,000	0	470,000