Stock And Stock Options (Narrative) (Details)				12 Months Ended
	Mar. 17, 2017 $ / shares	Mar. 21, 2016	Feb. 01, 2008 shares	Dec. 31, 2019 USD ($) item $ / shares shares	Dec. 31, 2018 USD ($) item $ / shares shares	Mar. 16, 2017 $ / shares	Oct. 25, 2000 shares
Stock Options [Line Items]
Number of shares that may be granted							7,000,000
Number of additional shares that may be granted			3,500,000
Stock Incentive Plan term				10 years
Purchase price floor of fair market value				85.00%
Stock based compensation | $				$ 17,000	$ 23,000
Reverse stock split		0.1
Common stock, shares issued				10,658,775	10,639,290
Common stock, par value | $ / shares				$ 0.001	$ 0.001
Directors And CEO [Member]
Stock Options [Line Items]
Stock based compensation | $				$ 17,000
Common stock, shares issued				19,485	19,366
Three Non-Executive Directors [Member]
Stock Options [Line Items]
Number of additional shares that may be granted				0	0
Number of directors | item				3	3
Voluntary Resignation [Member]
Stock Options [Line Items]
Stock Incentive Plan exercisable period				3 months
Rights Agreement [Member]
Stock Options [Line Items]
Date declared				Mar. 17, 2017
Date to be paid				Mar. 27, 2017
Date of record				Mar. 16, 2017
Common stock, Threshold for exercise of rights percentage	4.95%
Rights Agreement [Member] | Series A Preferred Stock [Member]
Stock Options [Line Items]
Common stock, par value | $ / shares	$ 0.001
Exercise price | $ / shares						$ 1.10
Dividends conversion ratio				1.000
Rights Agreement [Member] | Right [Member]
Stock Options [Line Items]
Number of preferred share purchase right for each outstanding share of its common stock to shareholder | $ / shares	$ 1