Income (loss) per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income per Common Share [Abstract]
Diluted net income per common share	$ 0.00	$ 0.04
Basic net income per common share	$ 0.00	$ 0.04
Numerator:
Net income (loss)	$ (17)	$ 197
Denominator:
Weighted average common shares outstanding	5,181	5,096
Dilutive potential common shares	0	0
Shares used in diluted net loss per common share calculations	5,181	5,096
Shares excluded from diluted weighted shares outstanding	83,086	125,222