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Note 8 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Computed tax at expected statutory rate | $ (54,104) | $ (877,791)
State and local income taxes, net of federal benefit | (2,971) | (9)
Non-US income taxed at different rates | 14,635 | (15,535)
Effect of change in corporate tax rate |  | 321,925
Deferred compensation | (6,508) |
Non-deductible expenses | 4,794 | 14,580
Valuation allowance | (227,182) | 193,584
Other | (25,916) | (2,184)
Total tax expense (benefit) | $ (297,252) | $ (365,430)

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deferred compensation. + References No definition available. + Details
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