Note 8 - Notes Payable (Details Textual) - USD ($) |
1 Months Ended | 3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
Feb. 23, 2021 |
May 18, 2020 |
Nov. 30, 2020 |
Nov. 30, 2019 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Dec. 31, 2020 |
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| Interest Expense, Debt, Total | $ 0 | $ 0 | $ 4,000 | $ 5,000 | |||||
| Notes Payable, Current, Total | 0 | 0 | $ 745,443 | ||||||
| Proceeds from Notes Payable, Total | 0 | 366,000 | |||||||
| Gain (Loss) on Extinguishment of Debt, Total | 0 | 0 | 366,000 | 0 | |||||
| Notes Payable Issued for Prepayment of Insurance Premiums [Member] | FIF [Member] | |||||||||
| Debt Instrument, Face Amount | $ 442,000 | $ 349,000 | |||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.50% | 5.00% | |||||||
| Debt Instrument, Term (Month) | 7 months | 8 months | |||||||
| Debt Instrument, Periodic Payment, Total | $ 64,000 | $ 44,000 | |||||||
| Interest Expense, Debt, Total | 0 | $ 0 | 4,000 | $ 5,000 | |||||
| Notes Payable, Current, Total | $ 0 | $ 0 | $ 379,000 | ||||||
| Paycheck Protection Program CARES Act [Member] | |||||||||
| Proceeds from Notes Payable, Total | $ 366,000 | ||||||||
| Gain (Loss) on Extinguishment of Debt, Total | $ 366,000 | ||||||||
| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of the required periodic payments including both interest and principal payments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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- Details
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