Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net earnings (loss) from continuing operations	$ 1,077	$ 2,150	$ 2,150	$ (1,096)	$ 2,052
Net (loss) earnings from discontinued operations	$ (344)	$ 133		$ (1,029)	$ (914)
Denominator:
Weighted-average common shares outstanding (shares)	22,498	21,847		22,225	22,084
Effect of dilutive securities from stock-based compensation plans	263	27		0	30
Weighted-average diluted common shares outstanding	22,761	21,874		22,225	22,114
Basic loss per common share from continuing operations (in usd per share)	$ 0.05	$ 0.10		$ (0.05)	$ 0.09
Basic loss per common share from discontinued operations (in usd per share)	(0.02)	0.01		(0.05)	(0.04)
Total basic loss per common share (in usd per share)	0.03	0.11		(0.10)	0.05
Diluted loss from continuing operations (in usd per share)	0.05	0.10		(0.05)	0.09
Diluted loss from discontinued operations (in usd per share)	(0.02)	0.01		(0.05)	(0.04)
Total diluted loss per common share (in usd per share)	$ 0.03	$ 0.11		$ (0.10)	$ 0.05