Note 2 - Liquidity (Details Textual) - Purchase Agreement [Member] - Vice Chairman of Board of Directors [Member] - Subsequent Event [Member] - USD ($) $ in Millions |
Apr. 12, 2022 |
Apr. 10, 2022 |
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| Debt Instrument, Face Amount | $ 2.5 | |
| Proceeds from Issuance of Long-Term Debt, Total | $ 1.5 | |
| Debt Instrument, Interest Rate, Stated Percentage | 8.00% |
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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