Note 4 - Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Accrued payroll and payroll related expenses	$ 751,704	$ 182,708
Accrued professional fees	100,000	48,338
Accrued clinical studies expenses	280,845	57,378
Other accrued expenses	29,729	70,108
Total	$ 1,162,278	$ 358,532