Quarterly report pursuant to Section 13 or 15(d)

Note 17 - Subsequent Events (Details Textual)

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Note 17 - Subsequent Events (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 7 Months Ended 8 Months Ended 12 Months Ended
Aug. 31, 2020
May 13, 2021
Aug. 31, 2020
Dec. 31, 2019
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
May 13, 2021
Dec. 31, 2020
Stock Issued During Period, Value, New Issues           $ 700,000      
Proceeds from Issuance of Preferred Stock and Preference Stock         $ 8,175,000      
Stock Issued During Period, Shares, New Issues (in shares)       2,100,000          
Preferred Stock, Shares Subscribed but Unissued, Subscriptions Receivable         $ 9,550,000   $ 9,550,000   $ 10,300,000
Conversion from Series D Preferred Stock To Common Stock [Member]                  
Conversion of Stock, Shares Issued (in shares)         2,341,258        
Subsequent Event [Member] | Conversion from Series D Preferred Stock To Common Stock [Member]                  
Conversion of Stock, Shares Converted (in shares)   5,000              
Conversion of Stock, Shares Issued (in shares)   316,725              
Series D Preferred Stock [Member]                  
Stock Issued During Period, Value, New Issues         $ 250,001        
Stock Subscriptions Receivable         500,000   500,000    
Preferred Stock, Shares Subscribed but Unissued, Subscriptions Receivable         9,600,000   9,600,000    
Keystone Capital Partners, LLC [Member] | Series D Preferred Stock [Member]                  
Stock Issued During Period, Value, New Issues $ 15,000,000                
Proceeds from Issuance of Preferred Stock and Preference Stock         $ 3,200,000   $ 5,000,000   $ 2,925,000
Stock Issued During Period, Shares, New Issues (in shares) 150,000   150,000       49,500    
Keystone Capital Partners, LLC [Member] | Series D Preferred Stock [Member] | Subsequent Event [Member]                  
Proceeds from Issuance of Preferred Stock and Preference Stock   $ 500,000           $ 5,500,000  
Stock Issued During Period, Shares, New Issues (in shares)   5,000