Note 10 - Stock-based Compensation and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule Of Common Stock Shares Reserved For Issuance And Shares Available For Grant [Table Text Block]

	Year Ended December 31,
	2023		2022		2021
Shares of common stock available for future grants		1,521,436		2,466,167		3,037,187

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Weighted-average		Time			Weight-average
	Grant-Date		Based			Grant Date		Performance
	Fair Value		Units			Fair Value		Based Units
Non-vested balance at December 31, 2020	$	8.95		732,083		$	24.50		30,449
Granted		13.26		452,403			—		—
Vested		10.97		(406,604	)		—		—
Cancelled/forfeited		24.50		(1,769	)		—		—
Non-vested balance at December 31, 2021	$	10.37		776,113		$	24.50		30,449
Granted		14.46		448,433			12.72		126,724
Vested		10.62		(355,226	)		24.50		(15,225	)
Cancelled/forfeited		12.72		(3,000	)		24.50		(15,224	)
Non-vested balance at December 31, 2022	$	12.33		866,320		$	12.72		126,724
Granted		40.45		247,874			39.91		61,856
Vested		13.08		(393,374	)		—		—
Cancelled/forfeited		21.12		(11,827	)		—		—
Non-vested balance at December 31, 2023	$	21.58		708,993		$	21.64		188,580

(In Thousands)	Year Ended December 31,
	2023		2022		2021
Grant date fair value of restricted stock units vested	$	5,407	$	3,561	$	4,460
Restricted stock unit compensation expense		10,755		6,469		5,638