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Income Taxes (Schedule Of Net Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Taxes [Abstract] |  |
Vacation Accrual | $ 29 | $ 24
Allowance for Doubtful Accounts | 2 | 2
Stock Compensation | 94 | 93
Bonus | 0 | 2
Depreciation and Amortization | 94 | 50
Inventory Obsolescence | 1 | 4
R&D Credit Carryforward | 235 | 171
Valuation allowance | (186) | (121)
Total Deferred Tax Assets | 269 | 225
Prepaid Expenses | 23 | 22
Total Deferred Tax Liabilities | 23 | 22
Net Deferred Tax Asset | $ 246 | $ 203

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