Note 5 - Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Accrued payroll and payroll related expenses	$ 653,899	$ 182,708
Accrued professional fees	31,809	48,338
Accrued clinical studies expenses	1,055,398	57,378
Other	35,364	70,108
Total	$ 1,776,470	$ 358,532