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Note 4 - Leases - Balance Sheet Information (Details) - USD ($)
Mar. 31, 2020
Apr. 01, 2019
Mar. 31, 2019
Operating lease right-of-use asset   $ 63,000  
Total right-of-use assets $ 559,347    
Finance lease liability, current 100,728  
Total lease liabilities 520,511    
Other Noncurrent Assets [Member]      
Operating lease right-of-use asset 51,535    
Property, Plant and Equipment, Net [Member]      
Finance lease right-of-use asset 507,812    
Accounts Payable and Accrued Liabilities [Member]      
Operating lease liability, current 47,431    
Current Portion of Financing Lease [Member]      
Finance lease liability, current 100,728    
Other Noncurrent Liabilities [Member]      
Operating lease liability, non-current 4,104    
Finance lease liability, non-current $ 368,248