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Note 3 - Liquidity and Going Concern Considerations (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 15, 2021
Dec. 30, 2020
Sep. 25, 2020
Aug. 21, 2020
Aug. 11, 2020
Apr. 28, 2020
Mar. 27, 2020
Jan. 31, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Jul. 20, 2021
Mar. 31, 2021
Sep. 30, 2020
Aug. 03, 2020
Net Income (Loss) Attributable to Parent, Total                 $ 1,263,875 $ (324,690) $ 1,568,440 $ (1,691,488) $ (5,900,000)        
Retained Earnings (Accumulated Deficit), Ending Balance                 (183,123,628)   (183,123,628)   (184,692,067)        
Working Capital                     (2,900,000)            
Long-term Debt, Gross                 9,109,098   9,109,098   10,082,549        
Sale of Promissory Note, Periodic Purchase Amount             $ 148,000                    
Other Accrued Liabilities, Current                 249,783   249,783   2,186,197        
Subsequent Event [Member]                                  
Maximum Number of Common Shares to be Outstanding After Merger (in shares)                           75,000,000      
Percent of Common Shares Issuable to Shareholders After Merger                           15.00%      
Tranche from ESOUSA Agreement [Member]                                  
Other Accrued Liabilities, Current                 145,000   145,000       $ 145,000 $ 145,000  
Esousa Holdings LLC [Member]                                  
Sale of Promissory Note, Percent of Gross Proceeds of Equity Sale Used to Finance Purchase of Note             88.00%                    
Sale of Promissory Note, Periodic Purchase Amount             $ 148,000                    
Proceeds from Sale of Notes Payable           $ 143,000 148,000                    
Stock Issued During Period, Shares, New Issues (in shares)     50,000 45,654 66,190 65,862   200,000                  
RBL Capital Group, LLC [Member]                                  
Proceeds from Sale of Notes Payable   $ 1,960,000 $ 426,000 $ 401,000 $ 707,000 $ 143,000 148,000                    
Stock Issued During Period, Shares, New Issues (in shares)   200,000                              
Receivable with Imputed Interest, Face Amount         $ 500,000                        
Receivable with Imputed Interest, Effective Yield (Interest Rate)         14.00%                        
RBL Capital Group, LLC [Member] | Tranche from ESOUSA Agreement [Member]                                  
Other Accrued Liabilities, Current                         $ 2,000,000.0        
Mullen [Member]                                  
Receivable with Imputed Interest, Face Amount         $ 500,000                        
Receivable with Imputed Interest, Effective Yield (Interest Rate)         14.00%                        
Registration Filing, Late Fee Per Day $ 13,333                                
Registration Filing, Late Fees Owed                 $ 1,500,000   $ 1,500,000            
Mullen [Member] | Subsequent Event [Member]                                  
Merger Agreement, Required Aggregate Cash and Cash Equivalents Less Payable and Debt                           $ 10,000,000      
Receivable with Imputed Interest, Face Amount                           $ 500,000      
Promissory Note Issued to RBL Capital Group [Member]                                  
Long-term Debt, Gross             $ 2,000,000                   $ 15,000,000