Net Income (Loss) per Common Share (Computation of Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net (loss) income		$ (356)	$ 1,449	$ (231)	$ 950
Adjustment for interest expense on convertible notes	[1]
Net (loss) income, as adjusted		$ (356)	$ 1,449	$ (231)	$ 950
Denominator:
Weighted average number of shares of common stock outstanding		7,061,545	7,031,041	7,058,026	7,022,983
Weighted average effect of dilutive stock options and other stock compensation			79,720		89,110
Weighted average number of shares of common stock outstanding, as adjusted		7,061,545	7,110,761	7,058,026	7,112,093
Net (loss) income per common share:
Net (loss) income per common share - Basic		$ (0.05)	$ 0.21	$ (0.03)	$ 0.14
Net (loss) income per common share - Diluted		$ (0.05)	$ 0.20	$ (0.03)	$ 0.13

[1] An adjustment for interest expense on convertible notes was excluded from the (loss) income per share calculation for the three and six months ended June 30, 2015 and 2014 as a result of the convertible notes being antidilutive.