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Note 7 - Convertible Notes (Details Textual)
1 Months Ended 3 Months Ended
May 12, 2021
USD ($)
May 12, 2021
USD ($)
Mar. 31, 2021
Subsequent Event [Member]      
Debt Instrument, Convertible, Number of Equity Instruments   48,644  
Convertible Debt [Member]      
Debt Instrument, Convertible, Number of Equity Instruments     4,043,948
Convertible Debt [Member] | Subsequent Event [Member]      
Debt Instrument, Convertible, Number of Equity Instruments 3,171,315    
Debt Instrument, Debt Default, Amount $ 5,113,927 $ 5,113,927