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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%

X

- 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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Namespace Prefix:	us-gaap_
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Balance Type:	na
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X

- 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

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- Details

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