Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings per share [Abstract]
Anti-dilutive stock options outstanding (in shares)	279,000	0	0	0
Reconciliation of the weighted average shares outstanding for the basic and diluted EPS computations [Abstract]
Net income (loss)	$ 101	$ (519)	$ (284)	$ (1,508)
Basic: [Abstract]
Shares outstanding at beginning of period (in shares)	15,585,000	15,612,000	15,592,000	15,473,000
Weighted average shares issued during the period, net (in shares)	(1,000)	0	(51,000)	0
WeightedAverageNumberOfSharesOutstandingBasic	15,584,000	15,612,000	15,541,000	15,473,000
Net income (loss) per common share, basic (in dollars per share)	$ 0.01	$ (0.03)	$ (0.02)	$ (0.10)
Diluted: [Abstract]
Weighted average common shares, basic (in shares)	15,584,000	15,612,000	15,541,000	15,473,000
Dilutive impact of stock options and restricted stock awards (in shares)	87,000	0	0	0
Weighted average common shares, diluted (in shares)	15,671,000	15,612,000	15,541,000	15,473,000
Net income (loss) per common share, diluted (in dollars per share)	$ 0.01	$ (0.03)	$ (0.02)	$ (0.10)