Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Computed "Expected" Federal Tax Expense (Benefit From)	$ 39	$ (4)
State Income Taxes, net of Federal Benefit	1	1
R&D Credits	(72)	(41)
Permanent Differences	5	7
Other	26	29
Total Federal and State Income Taxes	(1)	(8)
Accrued interest or penalties related to uncertain tax positions	$ 0	$ 0