Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net income (loss) from continuing operations	$ 2,229	$ 1,539	$ (2,699)
Net loss from discontinued operations	$ (1,324)	$ (4,765)	$ (4,827)
Denominator:
Weighted-average common shares outstanding (shares)	21,969	25,868	28,707
Basic earnings (loss) per common share from continuing operations (in USD per share)	$ 0.10	$ 0.06	$ (0.09)
Basic loss per common share from discontinued operations (in USD per share)	$ (0.06)	$ (0.18)	$ (0.17)
Numerator:
Net income (loss) from continuing operations	$ 2,229	$ 1,539	$ (2,699)
Net loss from discontinued operations	$ (1,324)	$ (4,765)	$ (4,827)
Denominator:
Weighted-average common shares outstanding (shares)	21,969	25,868	28,707
Incremental shares from stock-based compensation plans (shares)	47	36	0
Denominator for diluted earnings (loss) per common share (shares)	22,016	25,904	28,707
Diluted earnings (loss) per common share from continuing operations (in USD per share)	$ 0.10	$ 0.06	$ (0.09)
Diluted loss per common share from discontinued operations (in USD per share)	$ (0.06)	$ (0.18)	$ (0.17)