Note 9 - Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Shares Available Under Long-term Incentive Plan [Table Text Block]

	December 31,
	2023			2022
Approved and authorized shares		16,414,015			14,340,324
Shares subject to awards issued under plan		(15,759,791	)		(13,769,191	)
Shares available for future grant		654,224			571,133

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Stock Options			Average Exercise Price		Remaining Term in Years		Intrinsic Value (in thousands)
Outstanding at December 31, 2021		9,983,727		$	10.19		8.7	$	44,395
Awards granted		1,564,500		$	25.09
Exercised		(12,000	)	$	10.00
Forfeitures		(18,999	)	$	18.66
Outstanding at December 31, 2022		11,517,228		$	12.20		7.9	$	128,429
Awards granted		1,949,000			10.50
Exercised		(11,834	)	$	12.52
Forfeitures		(5,333	)	$	24.83
Outstanding at December 31, 2023		13,449,061		$	11.95		6.3	$	47,672
Vested at December 31, 2022		11,304,747		$	12.02		7.9	$	127,591
Exercisable at December 31, 2022		11,304,747		$	12.02		7.9	$	127,591
Vested at December 31, 2023		13,387,074		$	11.88		6.3	$	47,672
Exercisable at December 31, 2023		11,438,074		$	12.12		6.9	$	40,383