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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
NET INCOME PER SHARE [Abstract]
Net income		$ 168	$ (353)	$ 464	$ 495	$ 1,193	$ 1,067	$ 740	$ (173)	$ 774	$ 2,827
Weighted Average Shares Outstanding, Basic, shares										7,113	7,028
Weighted Average Shares Outstanding, Dilutive effect of common equivalent shares, shares										149	180
Weighted Average Shares Outstanding, Dilutive, shares										7,262	7,208
Per Share Amount, Basic (in usd per share)	[1]	$ 0.02	$ (0.05)	$ 0.07	$ 0.07	$ 0.17	$ 0.15	$ 0.11	$ (0.02)	$ 0.11	$ 0.40
Per Share Amount, Dilutive effect of common equivalent shares (in usd per share)										0	(0.01)
Per Share Amount, Dilutive (in usd per share)	[1]	$ 0.02	$ (0.05)	$ 0.06	$ 0.07	$ 0.16	$ 0.15	$ 0.10	$ (0.02)	$ 0.11	$ 0.39

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