Income Taxes (Schedule Of Net Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Vacation Accrual	$ 34	$ 33
Allowance for Doubtful Accounts	3	4
Stock Compensation	102	80
Bonus	10	0
Depreciation And Amortization Deferred Tax Asset	1	0
Net Unrealized Loss on Investments	21	0
State Carryforward R&D Credit	46	31
Total Deferred Tax Assets	217	148
Prepaid Expenses	33	35
Depreciation and Amortization Deferred Tax Liability	0	54
Net Unrealized Gain on Investments	0	450
Total Deferred Tax Liabilities	33	539
Net Deferred Tax Asset	$ 184	0
Net Deferred Tax Liability		$ (391)