Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income (loss)	$ (3,113)	$ 886	$ (9,032)	$ (463)
Denominator
Basic weighted average common shares outstanding (shares)	6,868	6,978	6,912	7,032
Effect of dilutive securities (shares)	0	36	0	0
Diluted weighted average common shares outstanding (shares)	6,868	7,014	6,912	7,032
Net income (loss) per common share
Net income (loss) per share — basic (usd per share)	$ (0.45)	$ 0.13	$ (1.31)	$ (0.07)
Net income (loss) per share — diluted (usd per share)	$ (0.45)	$ 0.13	$ (1.31)	$ (0.07)