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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)

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