Income (loss) per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss)	$ 1,131	$ (111)
Denominator:
Weighted average common shares outstanding	5,322	5,267
Dilutive potential common shares	20	0
Shares used in diluted net income (loss) per common share calculations	5,342	5,267
Basic net income (loss) per common share	$ 0.21	$ (0.02)
Diluted net income (loss) per common share	$ 0.21	$ (0.02)