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Note 3 - Dividends | 3 Months Ended
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Mar. 31, 2020
Notes to Financial Statements |
Dividends Disclosure [Text Block] | 3. Dividends On February 12, 2020, the Company declared a cash dividend on its common stock, payable on May 15, 2020 to stockholders of record as of May 1, 2020 , equal to $0.25 per share

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