Note 9 - Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

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

	March 31, 2024			December 31, 2023
Approved and authorized shares		16,414,015			16,414,015
Shares subject to awards issued under plan		(15,756,458	)		(15,759,791	)
Shares available for future grant		657,557			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		(3,333	)	$	29.67
Outstanding at March 31, 2024		13,445,728		$	11.95		6.1	$	65,821
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 March 31, 2024		13,387,074		$	11.88		6.1	$	65,821
Exercisable at March 31, 2024		11,438,074		$	12.12		6.7	$	55,550