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

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

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Note 10 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Jan. 24, 2022	Jan. 31, 2022	Dec. 31, 2021	Feb. 01, 2022
Restricted Stock [Member] \| The 2016 Employee Equity Compensation Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			15,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in USD per Share)			$ 27.10
Subsequent Event [Member]
Dividends Payable, Date Declared	Jan. 24, 2022
Dividends Payable, Amount Per Share (in USD per Share)	$ 0.30
Dividends Payable, Date of Record	Feb. 07, 2022
Dividends Payable, Date to be Paid	Feb. 18, 2022
Dividends Payable				$ 6.3
Subsequent Event [Member] \| Restricted Stock [Member] \| Employees [Member] \| The 2016 Employee Equity Compensation Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		17,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in USD per Share)		$ 25.87
Subsequent Event [Member] \| Restricted Stock [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		5,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in USD per Share)		$ 25.20