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Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Accrued license fees – current $ 3,000,000 $ 3,000,000
Accrued license fees – noncurrent 2,000,000 2,000,000
Accrued payroll 0 269,000
Other accrued expenses 75,000 108,826
Total accrued expenses $ 5,075,000 $ 5,377,826