Note 12 - Income Taxes - Unrecognized Tax Benefits Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 33,499	$ 25,407	$ 20,491
Increase for tax position of prior year			1,589
Increase for tax position of current year	9,191	9,782	4,663
Decrease due to settlement with tax authorities	(54)	(560)	(560)
Decrease due to lapse of statute of limitation	(458)	(223)	(776)
Decrease for tax position of prior year	(657)	(907)
Balance	$ 41,521	$ 33,499	$ 25,407