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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |
Income tax credit at statutory rates | $ (631) | $ (437)
Nondeductible expenses | 3 | 4
State income tax, net of federal benefits | (226) | (156)
Expiration of NOL & Credits | 1,530 | 1,559
Tax basis in excess of book Convertible Debt | 342 | 0
Expiration of Stock Options | 125 | 179
Other | 0 | 0
Change in valuation allowance | (1,143) | $ (1,149)
Total |  |

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