Nature Of Business And Significant Accounting Policies (Schedule Of Net Income (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Nature Of Business And Significant Accounting Policies [Abstract]
Net income (loss)	$ (10)	$ 295
Basic EPS, Shares	3,395,521	3,395,521
Effect of dilutive stock options, shares	0	5,496
Diluted EPS, Shares	3,395,521	3,401,017
Net income (loss) per share Basic	$ 0.00	$ 0.09
Effect of dilutive stock options, per share amount	0.00	0.00
Net income (loss) per share Diluted	$ 0.00	$ 0.09
Options excluded from the computation of diluted weighted-average shares outstanding|shares	312,158	257,500