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Note 8 - Notes Payable (Details Textual) - USD ($) |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 17, 2020 | Apr. 30, 2020 | Apr. 22, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 01, 2020 | Sep. 17, 2019
Amortization of Debt Issuance Costs |  |  |  | $ 992,705 | $ 592,598 |  |
Payments of Extension Costs on Note Payable |  |  |  | 351,025 | $ (0) |  |
Economic Injury Disaster Loan [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Unsecured Debt | $ 150,000 |  | $ 10,000 |  |  |  |
SBA CARES Act Paycheck Protection Program [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Unsecured Debt |  | $ 462,000 |  |  |  |  |
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 14,000,000.0
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 8.00%
Long-term Debt, Total |  |  |  | 8,800,000 |  | $ 8,800,000 |
Debt Instrument, Renewal Fee Percentage |  |  |  |  |  |  | 4.00%
Repayments of Notes Payable, Including Interest |  |  |  | 7,400,000 |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  | 0 |  |  | $ 1,400,000
Accretion Expense |  |  |  | 1,000,000.0 |  |  |
Debt Issuance Costs, Gross |  |  |  |  |  |  | $ 1,100,000
Amortization of Debt Issuance Costs |  |  |  | 748,000 |  |  |
Payments of Extension Costs on Note Payable |  |  |  | $ 351,000 |  |  |
Debt Instrument, Covenant, Debt to Property Fair Value Ratio |  |  |  |  |  |  | 75.00%

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