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Note 7 - PPP Loan (Details Textual) - USD ($)
12 Months Ended
Dec. 14, 2020
Apr. 14, 2020
Dec. 31, 2020
Dec. 31, 2019
Proceeds from Issuance of Long-term Debt, Total     $ 813,500
Paycheck Protection Program CARES Act [Member]        
Proceeds from Issuance of Long-term Debt, Total   $ 813,500    
Debt Instrument, Decrease, Forgiveness $ 813,500