Earnings Per Share - Schedule of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net loss	$ (1,169)	$ (299)	$ (3,631)	$ (1,983)
Denominator:
Weighted-average shares outstanding – basic (in shares)	51,883	51,770	51,857	52,738
Effect of dilutive securities:
Employee and director stock options and restricted common shares (in shares)	0	0	0	0
Weighted-average shares outstanding – diluted (in shares)	51,883	51,770	51,857	52,738
Basic earnings per share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.07)	$ (0.04)
Diluted earnings per share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.07)	$ (0.04)