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Note 14 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions | May 03, 2021 | Mar. 31, 2021 | May 04, 2020 | Jul. 23, 2018
--- | --- | --- | --- | ---
Dividends Payable, Amount Per Share (in dollars per share) |  | $ 0.28 | $ 0.28 | $ 0.27
Subsequent Event [Member] |  |  |  |
Dividends Payable, Amount Per Share (in dollars per share) | $ 0.30 |  |  |
Payments of Dividends, Total | $ 6.1 |  |  |
Dividends Payable, Date Declared | May 03, 2021 |  |  |
Dividends Payable, Date to be Paid | May 21, 2021 |  |  |
Dividends Payable, Date of Record | May 14, 2021 |  |  |

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- Definition Date the declared dividend will be paid, in CCYY-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=121583591&loc=d3e4304-108586 + Details
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- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + 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=121583591&loc=d3e4304-108586 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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