Note 9 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions	Oct. 26, 2020	Oct. 31, 2020
Dividends Payable, Amount Per Share (in dollars per share)	$ 0.28
Dividends Payable		$ 5.7
Dividends Payable, Date Declared	Oct. 26, 2020
Dividends Payable, Date of Record	Nov. 09, 2020
Dividends Payable, Date to be Paid	Nov. 20, 2020

Date the declared dividend will be paid, in CCYY-MM-DD format.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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