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Note 4 - Discontinued Operations (Details Textual) - USD ($)
12 Months Ended 28 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Dec. 31, 2021
Nov. 27, 2019
Inventory, Net, Total   $ 0      
Proceeds from Lines of Credit, Total $ 0 375,000      
Line of Credit [Member]          
Debt Instrument, Interest Rate, Stated Percentage         8.00%
Line of Credit Facility, Maximum Borrowing Capacity         $ 470,000
Proceeds from Lines of Credit, Total     $ 485,000    
Line of Credit Facility, Maximum Borrowing Capacity, Increased     $ 15,000    
Long-term Line of Credit, Total       $ 485,000  
Interest Payable       $ 49,211  
Maximum [Member]          
Lessee, Finance Lease, Discount Rate 11.50%   11.50%    
Discontinued Operations [Member]          
Accounts Receivable, after Allowance for Credit Loss, Total $ 0   $ 0    
Inventory, Net, Total   1,689,304      
Deposits Assets, Noncurrent $ 0 $ 82,904 $ 0