Note 5 - Prepaid Expenses - Schedule of Prepaid Expenses (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Prepaid research and development	$ 1,567,871	$ 1,215,834
Prepaid insurance	136,880	417,854
Professional services	131,197	128,229
Financial exchange fees	14,500	0
Retainer and security deposits	14,218	14,218
Prepaid rent	9,360	4,488
Other	9,171	33,279
Total prepaid expenses	$ 1,883,197	$ 1,813,902