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Note 18 - Subsequent Event (Details Textual) - Revolving Credit Facility [Member] - PNC Bank [Member] - USD ($) | Jan. 04, 2022 | Feb. 23, 2022 | Nov. 30, 2021 | Sep. 01, 2021 | Aug. 31, 2021 | Aug. 30, 2021
--- | --- | --- | --- | --- | --- | ---
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 5,000,000 | $ 5,000,000.0 | $ 5,000,000 | $ 3,000,000
Forecast [Member] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 3,000,000 |  |  |  |
Bloomberg Short-Term Bank Yield Index [Member] | Subsequent Event [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.50% |  |  |  |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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