Note 2 - Recapitalization (Details Textual) - USD ($) | | | | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | | |
Feb. 05, 2020 | Dec. 10, 2019 | Sep. 17, 2018 | Dec. 31, 2021 | Oct. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Sep. 30, 2019 | Dec. 31, 2020 | Nov. 30, 2021 | Nov. 30, 2020 |
Stock Issued During Period, Shares, New Issues (in shares) | | | | | 487,500 | | | | | | | | | |
Proceeds from Issuance of Common Stock | | | | | $ 195,000 | | | | | | | | | |
Shares Issued, Price Per Share (in dollars per share) | | | | | $ 0.40 | | | | | | | | | |
Share-based Payment Arrangement, Expense | | | | | | | $ 7,512 | $ 0 | $ 6,430 | $ 0 | | | | |
Class of Warrant or Right, Outstanding (in shares) | | | | | | | 233,333 | 7,098,794 | 233,333 | 7,098,794 | | | | |
Three Individuals [Member] | | | | | | | | | | | | | | |
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture (in shares) | | | | | 962,500 | | | | | | | | | |
Share-based Payment Arrangement, Expense | | | | | $ 333,628 | | | | | | | | | |
Series A Preferred Stock Converted into Common Stock [Member] | | | | | | | | | | | | | | |
Conversion of Stock, Shares Issued (in shares) | | | | | 2,700,000 | | | | | | | | | |
Conversion of the 2018 Convertible Notes into Common Stock [Member] | | | | | | | | | | | | | | |
Repayments of Convertible Debt | $ 350,000 | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares) | 350,000 | | | | | | | | | | | | | |
Conversion of the 2019 Senior Secured Notes into Common Stock [Member] | | | | | | | | | | | | | | |
Debt Conversion, Original Debt, Amount | | | | | $ 305,000 | | | | | | | | | |
Debt Conversion, Original Debt, Accrued Interest, Amount | | | | | $ 30,400 | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | | | | | 838,487 | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | | | | | $ 0.40 | | | | | | | | | |
Warrants Issued with the 2018 Convertible Notes [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | 466,666 | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | | | | | | | $ 0.15 | | $ 0.15 | | | | | |
Class of Warrant or Right, Outstanding (in shares) | | | | | | | 233,333 | 233,333 | 233,333 | 233,333 | | | | |
Warrants Issued with the 2018 Convertible Notes [Member] | Auctus Fund, LLC [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | 233,333 | | | | | | | | | | | |
Warrants Issued with the 2018 Convertible Notes [Member] | EMA Financial, LLC [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | 233,333 | | | | | | | | | | | |
Warrants Issued with 2019 Senior Secured Notes [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | | | | 457,500 | | | | | | | | |
Warrants Issued to Investors [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | | | 3,977,961 | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | | | | | $ 0.40 | | | | | | | | | |
Warrants Issued to Three Individuals [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | | | 2,887,500 | | | | | | | | | |
Modified Warrants [Member] | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | | | | | | | | | | | | | | 6,865,461 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | | | | $ 0.20 | | | | | | | | $ 0.20 | $ 0.40 | $ 0.40 |
Share-based Payment Arrangement, Expense | | | | $ 13,936 | | | | | | | | | | |
Class of Warrant or Right, Outstanding (in shares) | | | | 6,865,461 | | | | | | | | | | |
Warrant Modification, Amount | | | | $ 795,592 | | | | | | | | | | |
The 2018 Convertible Notes [Member] | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | 12% | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | $ 205,000 | | | |
Proceeds from Convertible Debt | | | $ 315,800 | | | | | | | | | | | |
Payments of Debt Issuance Costs | | | $ 34,200 | | | | | | | | | | | |
Debt Instrument, Term (Month) | | | 9 months | | | | | | | | | | | |
Debt Instrument, Convertible, Period After Date of Issuance (Month) | | | 6 months | | | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price, Percentage Discount of Common Stock Trading Price | | | 40% | | | | | | | | | | | |
Debt Instrument, Amendment Fee | | | | | | | | | | | $ 69,000 | | | |
Debt Instrument, Amendment Fee, Percent of Face Value | | | | | | | | | | | 20% | | | |
Debt Instrument, Increase (Decrease) in Principal of Each Note | | | | | | | | | | | $ 30,000 | | | |
Repayments of Convertible Debt | | $ 220,000 | | | | | | | | | | | | |
Gain (Loss) on Extinguishment of Debt, Total | | | | | | | | | | | | $ 246,000 | | |
The 2018 Convertible Notes [Member] | Auctus Fund, LLC [Member] | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | $ 175,000 | | | | | | | | | | | |
The 2018 Convertible Notes [Member] | EMA Financial, LLC [Member] | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | $ 175,000 | | | | | | | | | | | |
The 2019 Senior Secured Notes [Member] | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | 12% | | | | | | | | |
Debt Instrument, Face Amount | | | | | | $ 305,000 | | | | | | | | |
Gain (Loss) on Extinguishment of Debt, Total | | | | | $ 89,776 | | | | | | | | | |
Proceeds from Issuance of Senior Long-term Debt | | | | | | $ 220,000 | | | | | | | | |