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Note 8 - Subscription Receivable - Affiliates (Details Textual) - USD ($)
6 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Minimum [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.60  
Maximum [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 2  
Warrants with Extended Expiration Dates [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 3,547,735  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 0.75
Chief Executive Officer [Member] | Warrants Issused, Subscription Receivable [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 5,565,000  
Chief Executive Officer [Member] | Warrants Issused, Subscription Receivable [Member] | Minimum [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.60  
Chief Executive Officer [Member] | Warrants Issused, Subscription Receivable [Member] | Maximum [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1  
Chief Executive Officer [Member] | Secured Promissory Note [Member]    
Financing Receivable, Principal Amount $ 428,250  
Financing Receivable, after Allowance for Credit Loss, Total $ 474,892  
Financing Receivable, Interest Rate, Stated Percentage 4.00%  
Former Employee [Member] | Warrants Issused, Subscription Receivable [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 928,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.75  
Class of Warrant or Right, Exercise Bonus, Percentage 90.00%  
Former Employee [Member] | Secured Promissory Note [Member]    
Financing Receivable, Principal Amount $ 46,400  
Financing Receivable, after Allowance for Credit Loss, Total $ 52,238  
Financing Receivable, Interest Rate, Stated Percentage 4.00%  
President [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.75  
President [Member] | Warrants Issused, Subscription Receivable [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 300,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.60  
Class of Warrant or Right, Exercise Bonus, Percentage 75.00%  
President [Member] | Secured Promissory Note [Member]    
Financing Receivable, Principal Amount $ 30,000  
Financing Receivable, after Allowance for Credit Loss, Total $ 32,896  
Financing Receivable, Interest Rate, Stated Percentage 4.00%  
Financing Receivable, Collateral $ 30,000