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Note 3 - Bank Note Payable (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2020
Proceeds from Issuance of Long-term Debt, Total   $ 0   $ 890,000
Gain (Loss) on Extinguishment of Debt, Total   $ (0)   $ 896,000
Paycheck Protection Program CARES Act [Member]        
Proceeds from Issuance of Long-term Debt, Total $ 889,858      
Paycheck Protection Program CARES Act [Member] | Other Income [Member]        
Gain (Loss) on Extinguishment of Debt, Total     $ 896,000