Note 5 - Prepaid Expenses - Schedule of Prepaid Expenses (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Prepaid research and development	$ 1,215,834	$ 507,733
Prepaid insurance	417,854	222,476
Professional services	128,229	108,850
Retainer and security deposits	14,218	14,218
Prepaid rent	4,488	4,275
Other	33,279	4,792
Total prepaid expenses	$ 1,813,902	$ 862,344