Nature Of Business And Significant Accounting Policies (Schedule Of Net Income Per Common Share) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Nature Of Business And Significant Accounting Policies [Abstract]
Net income	$ 202,000	$ 1,214,000
Net income per share Basic	$ 0.06	$ 0.36
Effect of dilutive stock options, per share amount	0.00	0.00
Net income per share Diluted	$ 0.06	$ 0.36
Basic EPS, Shares	3,395,521	3,395,521
Effect of dilutive stock options, shares	424	0
Diluted EPS, Shares	3,395,945	3,395,521
Weighted Average Number Diluted Shares Outstanding Adjustment Incorrectly Reported In Prior Year		257,500
Effect Of Dilutive Stock Options Per Share Amount Incorrect Dilutive EPS Effect in Prior Year		$ 0.03