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Note 2 - Income Taxes - Income Taxes Reconciliation (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Expected income tax (benefit) provision for federal income taxes $ (207,000) $ 39,000
State income taxes, net of federal benefit (7,000) 7,000
Non-deductible meals, entertainment, and life insurance 11,000 12,000
Research and development credit (29,000) (43,000)
Change in valuation allowance 51,000 18,000
Prior year true-ups and other 9,000 13,000
$ (172,000) $ 46,000