Net Income Per Share (Schedule Of Net Income Per Basic And Diluted Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
NET INCOME PER SHARE [Abstract]
Net income		$ 1,193	$ 1,067	$ 740	$ (173)	$ 503	$ (72)	$ 1,095	$ (214)	$ 2,827	$ 1,312
Weighted Average Shares Outstanding, Basic, shares										7,028	6,946
Weighted Average Shares Outstanding, Dilutive effect of common equivalent shares, shares										180	129
Weighted Average Shares Outstanding, Dilutive, shares										7,208	7,075
Per Share Amount, Basic (in usd per share)	[1]	$ 0.17	$ 0.15	$ 0.11	$ (0.02)	$ 0.07	$ (0.01)	$ 0.16	$ (0.03)	$ 0.40	$ 0.19
Per Share Amount, Dilutive effect of common equivalent shares (in usd per share)										(0.01)	0
Per Share Amount, Dilutive (in usd per share)	[1]	$ 0.16	$ 0.15	$ 0.10	$ (0.02)	$ 0.07	$ (0.01)	$ 0.15	$ (0.03)	$ 0.39	$ 0.19

[1] The summation of quarterly per share amounts may not equal the calculation for the full year, as each quarterly calculation is performed discretely.