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Note 8 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares									12 Months Ended
	Jul. 20, 2023	Apr. 21, 2023	Jan. 10, 2023	Oct. 20, 2022	Jul. 20, 2022	Apr. 22, 2022	Jan. 21, 2022	Oct. 20, 2021	Aug. 31, 2023	Aug. 31, 2022
Amount, per share (in dollars per share)	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.28	$ 0.28
Record date	Aug. 02, 2023	May 03, 2023	Feb. 01, 2023	Nov. 03, 2022	Aug. 03, 2022	May 04, 2022	Feb. 02, 2022	Nov. 03, 2021
Payable date	Aug. 16, 2023	May 17, 2023	Feb. 15, 2023	Nov. 16, 2022	Aug. 17, 2022	May 18, 2022	Feb. 16, 2022	Nov. 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
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

+ 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
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482913/230-10-50-3

+ Details

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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.

+ Details

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