Note 9 - Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

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

	June 30, 2024			December 31, 2023
Approved and authorized shares		16,414,015			16,414,015
Shares subject to awards issued under plan		(15,808,671	)		(15,759,791	)
Shares available for future grant		605,344			654,224

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, 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
Forfeitures		(4,999	)	$	26.44
Outstanding at June 30, 2024		13,444,062		$	11.95		5.8	$	160,592
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
Vested at June 30, 2024		13,428,404		$	11.94		5.8	$	160,279
Exercisable at June 30, 2024		11,479,404		$	12.18		6.4	$	139,815