Note 6 - Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended	9 Months Ended
	Oct. 01, 2021	Aug. 01, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Common Stock, Dividends, Per Share, Declared		$ 0.04	$ 0.06	$ 0.54		$ 0.18	$ 0.62
Payments of Ordinary Dividends, Common Stock	$ 44,800					$ 14,709	$ 6,626
Paid Quarterly [Member]
Common Stock, Dividends, Per Share, Declared					$ 0.04	$ 0.06
Payments of Ordinary Dividends, Common Stock					$ 6,600	$ 14,700
Special Dividend [Member]
Common Stock, Dividends, Per Share, Declared		$ 0.50