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Note 10 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares								12 Months Ended
	Jul. 20, 2022	Apr. 22, 2022	Jan. 21, 2022	Oct. 20, 2021	Jul. 21, 2021	Apr. 23, 2021	Jan. 15, 2021	Aug. 31, 2022	Aug. 31, 2021
Amount (in dollars per share)	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.065	$ 0.065	$ 0.065	$ 0.28	$ 0.195
Record date	Aug. 03, 2022	May 04, 2022	Feb. 02, 2022	Nov. 03, 2021	Aug. 04, 2021	May 05, 2021	Feb. 03, 2021
Payable date	Aug. 17, 2022	May 18, 2022	Feb. 16, 2022	Nov. 17, 2021	Aug. 18, 2021	May 19, 2021	Feb. 17, 2021

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

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X

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

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X

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

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