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Note 7 - Accrued Expenses (Details Textual) - USD ($) |  |  |  |  |  | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2020 | Sep. 25, 2020 | Aug. 21, 2020 | Aug. 11, 2020 | Apr. 28, 2020 | Jan. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020
Accrued Liabilities, Current, Total |  |  |  |  |  |  | $ 3,082,697 |  | $ 4,604,097 |
Other Accrued Liabilities, Current |  |  |  |  |  |  | 249,783 |  | 2,186,197 |
RBL Capital Group, LLC [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 200,000 |  |  |  |  |  |  |  |  |
Esousa Holdings LLC [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 50,000 | 45,654 | 66,190 | 65,862 | 200,000 |  |  |  |
Tranche from ESOUSA Agreement [Member] |  |  |  |  |  |  |  |  |  |
Other Accrued Liabilities, Current |  |  |  |  |  |  | 145,000 | $ 145,000 |  | $ 145,000
Tranche from ESOUSA Agreement [Member] | RBL Capital Group, LLC [Member] |  |  |  |  |  |  |  |  |  |
Other Accrued Liabilities, Current |  |  |  |  |  |  |  |  | 2,000,000.0 |
Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |
Accrued Bonuses |  |  |  |  |  |  | 1,500,000 |  | 1,300,000 |
Employees [Member] |  |  |  |  |  |  |  |  |  |
Accrued Bonuses |  |  |  |  |  |  | $ 410,000 |  | $ 386,000 |

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