Note 3 - Balance Sheet Components - Prepaid Expenses (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Prepaid clinical trial expenses	$ 1,020,352	$ 0
Prepaid insurance premiums	42,383	123,248
Prepaid rent	13,045	13,045
Other prepaid expenses	60,000	19,947
Total prepaid expenses	$ 1,135,780	$ 156,240