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Note K - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 34.00% |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ 1,783 |
Operating Loss Carryforwards, Total |  |  | $ 550
Effective Income Tax Rate Reconciliation, Percent, Total |  | 34.00% |
Unrecognized Tax Benefits, Ending Balance | $ 0 |  | $ 0

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