Net Income (Loss) Per Share (Schedule of Net Income (Loss) per Basic and Diluted Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Income (Loss)	$ (72)	$ 1,172	$ 809	$ 5,476
Weighted Average Shares Outstanding, Basic (in shares)	6,959	6,859	6,939	6,813
Per Share Amount, Basic (in dollars per share)	$ (0.01)	$ 0.17	$ 0.12	$ 0.80
Weighted Average Shares Outstanding, dilutive effect of common equivalent shares, (in shares)	0	295	102	200
Per Share Amount, Dilutive effect of common equivalent shares (in dollars per share)	$ 0	$ (0.01)	$ (0.01)	$ (0.02)
Weighted Average Shares Outstanding, Dilutive (in shares)	6,959	7,154	7,041	7,013
Per Share Amount, Dilutive (in dollars per share)	$ (0.01)	$ 0.16	$ 0.11	$ 0.78