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Note 10 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended
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Apr. 21, 2023 | Jan. 20, 2023 | Oct. 20, 2022 | Apr. 22, 2022 | Jan. 21, 2022 | Oct. 20, 2021 | May 31, 2023 | May 31, 2022 | May 31, 2023 | May 31, 2022
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share) | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.07 | $ 0.21 | $ 0.21
Date of record | May 03, 2023 | Feb. 01, 2023 | Nov. 03, 2022 | May 04, 2022 | Feb. 02, 2022 | Nov. 03, 2021 |  |  |  |
Payable date | May 17, 2023 | Feb. 15, 2023 | Nov. 16, 2022 | May 18, 2022 | Feb. 16, 2022 | Nov. 17, 2021 |  |  |  |

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- 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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- 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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- 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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