Note 9 - Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	March 31, 2023			December 31, 2022
Approved and authorized shares		14,341,882			14,340,324
Shares subject to awards issued under plan		(13,755,690	)		(13,769,191	)
Shares available for future grant		586,192			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, 2021		11,517,228		$	12.20		7.9	$	128,429
Exercised		(11,834	)	$	12.52
Forfeitures		(1,667	)	$	29.67
Outstanding at December 31, 2022		11,503,727		$	12.20		7.7	$	88,546
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 March 31, 2023		11,291,246		$	12.02		7.7	$	86,644
Exercisable at March 31, 2023		11,291,246		$	12.02		7.7	$	86,644