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Note 4 - Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | 2021 |  |  | 2020 |
Accrued license fees – current |  | $ | 3,000,000 |  |  | $ | - |
Accrued license fees – noncurrent |  |  | 2,000,000 |  |  |  | - |
Accrued payroll |  |  | 269,000 |  |  |  | 279,696 |
Other accrued expenses |  |  | 108,826 |  |  |  | 79,585 |
Total accrued expenses |  | $ | 5,377,826 |  |  | $ | 359,281 |

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