Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Series 1 and Series 2 Convertible Notes (Details Textual)

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Note 10 - Series 1 and Series 2 Convertible Notes (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jun. 22, 2020
Jun. 04, 2020
Jun. 03, 2020
Jun. 30, 2022
Jun. 30, 2022
Jun. 30, 2021
Nov. 06, 2020
Series D Warrants [Member]              
Proceeds from Warrant Exercises $ 82,000   $ 850,000        
Class of Warrant or Right, Warrants Exercised (in shares) 454,546            
Remaining Warrants [Member]              
Class of Warrant or Right, Warrants Exercised (in shares)   4,727,273          
Series J Warrants [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 340,910 3,545,454         3,375,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.25 $ 0.25          
Warrants and Rights Outstanding, Term (Year) 1 year 1 year          
Series 1 Convertible Notes [Member]              
Debt Instrument, Interest Rate, Stated Percentage   10.00%          
Debt Instrument, Face Amount   $ 550,000          
Debt Instrument, Convertible, Conversion Price (in dollars per share)   $ 0.27          
Series 1 Convertible Notes [Member] | Maximum [Member]              
Debt Instrument, Convertible, Conversion Price (in dollars per share)   $ 0.32          
Series 2 Convertible Notes [Member]              
Debt Instrument, Face Amount             $ 1,050,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)             $ 0.25
Series 1 & 2 Convertible Notes [Member]              
Interest Expense, Debt, Total       $ 40,000 $ 120,000 $ 110,000