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Note 3 - Liquidity and Going Concern Considerations (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
May 07, 2020
Mar. 27, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Apr. 23, 2020
Net Income (Loss) Attributable to Parent, Total     $ (1,366,216) $ (1,120,847) $ (6,500,000)  
Retained Earnings (Accumulated Deficit), Ending Balance     (180,116,849)   $ (178,750,634)  
Working Capital     2,600,000      
Agreement, Maximum Notes Payable to be Paid     $ 9,431,157      
Subsequent Event [Member]            
Proceeds from Paycheck Protection Program Under CARES Act $ 491,492          
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   148,000        
Promissory Note Issued to RBL Capital Group [Member]            
Agreement, Maximum Notes Payable to be Paid   $ 2,000,000        
Promissory Note Issued to RBL Capital Group [Member] | Subsequent Event [Member]            
Agreement, Maximum Notes Payable to be Paid           $ 5,000,000