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Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Dec. 01, 2020
Property and equipment, gross $ 659,441   $ 659,441
Accumulated depreciation and amortization (516,217)   (511,700)
Property and equipment, net 143,224 $ 147,741 147,741
Laboratory Equipment [Member]      
Property and equipment, gross 532,100   532,100
Leasehold Improvements [Member]      
Property and equipment, gross 115,605   115,605
Other Furniture Fixtures And Equipment [Member]      
Property and equipment, gross $ 11,736   $ 11,736