Note 9 - Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

	June 30, 2023			December 31, 2022
Approved and authorized shares		14,459,464			14,340,324
Shares subject to awards issued under plan		(13,813,457	)		(13,769,191	)
Shares available for future grant		646,007			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
Exercised		(11,834	)	$	12.52
Forfeitures		(2,667	)	$	29.67
Outstanding at June 30, 2023		11,502,727		$	12.20		7.7	$	8,381
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 June 30, 2023		11,290,246		$	12.02		7.7	$	8,381
Exercisable at June 30, 2023		11,290,246		$	12.02		7.7	$	8,381