Note 9 - Incentive Plans - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Outstanding (in shares)	13,449,061	11,517,228	11,517,228
Outstanding, average exercise price (in dollars per share)	$ 11.95	$ 12.2	$ 12.2
Outstanding, remaining term (Year)	6 years 1 month 6 days		6 years 3 months 18 days	7 years 10 months 24 days
Outstanding, intrinsic value	$ 65,821		$ 47,672	$ 128,429
Awards granted (in shares)			1,949,000
Awards granted, average exercise price (in dollars per share)			$ 10.5
Shares issued upon options being exercised (in shares)		11,834	11,834
Exercised, average exercise price (in dollars per share)			$ 12.52
Forfeitures (in shares)	(3,333)		(5,333)
Forfeitures, average exercise price (in dollars per share)	$ 29.67		$ 24.83
Outstanding (in shares)	13,445,728		13,449,061	11,517,228
Outstanding, average exercise price (in dollars per share)	$ 11.95		$ 11.95	$ 12.2
Vested (in shares)			13,387,074	13,387,074
Vested, average exercise price (in dollars per share)			$ 11.88	$ 11.88
Vested, remaining term (Year)			6 years 3 months 18 days	6 years 1 month 6 days
Vested, intrinsic value			$ 47,672	$ 65,821
Exercisable (in shares)			11,438,074	11,438,074
Exercisable, average exercise price (in dollars per share)			$ 12.12	$ 12.12
Exercisable, remaining term (Year)			6 years 10 months 24 days	6 years 8 months 12 days
Exercisable, intrinsic value			$ 40,383	$ 55,550