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Note 8 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 21, 2021 | Apr. 23, 2021 | Jan. 15, 2021 | Jan. 22, 2020 | Oct. 22, 2019 | Nov. 30, 2020 | Aug. 31, 2020 | May 31, 2020 | Aug. 31, 2021 | Aug. 31, 2020
Amount (in dollars per share) | $ 0.065 | $ 0.065 | $ 0.065 | $ 0.065 | $ 0.065 | $ 0 | $ 0 | $ 0 | $ 0.20 | $ 0.13
Record date | Aug. 04, 2021 | May 05, 2021 | Feb. 03, 2021 | Feb. 05, 2020 | Nov. 06, 2019 |  |  |  |  |
Payable date | Aug. 18, 2021 | May 19, 2021 | Feb. 17, 2021 | Feb. 19, 2020 | Nov. 20, 2019 |  |  |  |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 + 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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