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Note 9 - Incentive Plans - Stock Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Outstanding, options (in shares) 11,517,228 9,983,727  
Outstanding, weighted average exercise price (in dollars per share) $ 12.2 $ 10.19  
Outstanding, term (Year) 6 years 3 months 18 days 7 years 10 months 24 days 8 years 8 months 12 days
Outstanding, intrinsic value $ 47,672 $ 128,429 $ 44,395
Awards granted, options (in shares) 1,949,000 1,564,500  
Awards granted, weighted average exercise price (in dollars per share) $ 10.5 $ 25.09  
Exercised, options (in shares) (11,834) (12,000) (154,268)
Exercised, weighted average exercise price (in dollars per share) $ 12.52 $ 10  
Forfeitures, options (in shares) (5,333) (18,999)  
Forfeitures, weighted average exercise price (in dollars per share) $ 24.83 $ 18.66  
Outstanding, options (in shares) 13,449,061 11,517,228 9,983,727
Outstanding, weighted average exercise price (in dollars per share) $ 11.95 $ 12.2 $ 10.19
Vested, options (in shares) 13,387,074 11,304,747  
Vested,, weighted average exercise price (in dollars per share) $ 11.88 $ 12.02  
Vested,, remaining term (Year) 6 years 3 months 18 days 7 years 10 months 24 days  
Vested, intrinsic value $ 47,672 $ 127,591  
Exercisable, options (in shares) 11,438,074 11,304,747  
Exercisable,, weighted average exercise price (in dollars per share) $ 12.12 $ 12.02  
Exercisable,, remaining term (Year) 6 years 10 months 24 days 7 years 10 months 24 days  
Exercisable, intrinsic value $ 40,383 $ 127,591  
Vested, options (in shares) 13,387,074 11,304,747