Net (loss) Income Per Common Share (Computation of Basic and Diluted Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net (loss) income	$ (3,331)	$ 2,086	$ (4,742)	$ 3,308
Denominator:
Weighted average number of shares of common stock outstanding	8,810,396	8,773,263	8,805,866	8,769,242
Weighted average effect of dilutive share-based compensation		74,564		90,901
Diluted weighted average number of shares of common stock outstanding	8,810,396	8,847,827	8,805,866	8,860,143
Net (loss) income per common share:
Net (loss) income per common share - Basic	$ (0.38)	$ 0.24	$ (0.54)	$ 0.38
Net (loss) income per common share - Diluted	$ (0.38)	$ 0.24	$ (0.54)	$ 0.37