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Note 1 - Description of Business, Reverse Merger and Liquidity (Details Textual) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Aug. 31, 2018
Jun. 30, 2016
Short-term Debt, Total $ 3,049,651 $ 2,545,199    
Cash and Cash Equivalents, at Carrying Value, Ending Balance 723,352 1,121,763   $ 1,414,706
Working Capital (Deficit) 6,613,857      
Cash and Cash Equivalents, Period Increase (Decrease), Total (398,411) (292,943)    
Subsequent Event [Member]        
Cash and Cash Equivalents, at Carrying Value, Ending Balance     $ 855,000  
Estimated Monthly Operational Requirement     1,200,000  
Subsequent Event [Member] | Grid Notes [Member]        
Debt Instrument, Face Amount     2,000,000  
Secured Debt, Total     1,351,482  
Subsequent Event [Member] | Secured Notes Maturing on June 15, 2018 [Member]        
Debt Instrument, Face Amount     160,000  
Subsequent Event [Member] | Subordinated Secured Note Payable [Member] | Former Chief Financial Officer [Member] | Accrued Expenses [Member]        
Due to Related Parties, Total     1,698,169  
Secured Convertible Note Payable [Member]        
Short-term Debt, Total   $ 2,545,199    
Debt Instrument, Face Amount $ 3,049,651      
Secured Convertible Note Payable [Member] | Subsequent Event [Member]        
Short-term Debt, Total     $ 3,209,651