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Note 4 - Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | 2019 |  |  | 2018 |
Accrued management salaries |  | $ | 1,323,483 |  |  | $ | 924,509 |
Accrued directors’ fees |  |  | 409,219 |  |  |  | 295,670 |
Other accrued expenses |  |  | 118,338 |  |  |  | 18,373 |
Total accrued expenses |  | $ | 1,851,040 |  |  | $ | 1,238,552 |

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