Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net loss	$ (3,409)	$ (239)	$ (5,270)	$ (5,381)
Denominator:
Weighted-average common shares outstanding (shares)	25,167	27,744	26,015	29,203
Basic loss per common share (usd per share)	$ (0.14)	$ (0.01)	$ (0.20)	$ (0.18)
Numerator:
Net loss	$ (3,409)	$ (239)	$ (5,270)	$ (5,381)
Denominator:
Weighted-average common shares outstanding (shares)	25,167	27,744	26,015	29,203
Incremental shares from stock-based compensation plans (shares)	0	0	0	0
Denominator for diluted earnings (loss) per common share (shares)	25,167	27,744	26,015	29,203
Diluted loss per common share (usd per share)	$ (0.14)	$ (0.01)	$ (0.20)	$ (0.18)