Earnings (Loss) Per Common Share - Schedule of Computations of Basic and Diluted Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income from continuing operations	$ 4,556	$ 2,229	$ 1,539
Net loss from discontinued operations	$ (1,372)	$ (1,324)	$ (4,765)
Denominator:
Weighted-average common shares outstanding (shares)	21,937	21,969	25,868
Basic earnings per common share from continuing operations (in USD per share)	$ 0.21	$ 0.10	$ 0.06
Basic loss per common share from discontinued operations (in USD per share)	$ (0.06)	$ (0.06)	$ (0.18)
Numerator:
Net income from continuing operations	$ 4,556	$ 2,229	$ 1,539
Net loss from discontinued operations	$ (1,372)	$ (1,324)	$ (4,765)
Denominator:
Weighted-average common shares outstanding (shares)	21,937	21,969	25,868
Effect of dilutive securities from stock-based compensation plans (shares)	174	47	36
Denominator for diluted earnings per common share (shares)	22,111	22,016	25,904
Diluted earnings per common share from continuing operations (in USD per share)	$ 0.21	$ 0.10	$ 0.06
Diluted loss per common share from discontinued operations (in USD per share)	$ (0.06)	$ (0.06)	$ (0.18)