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Note 15 - Equity-based Compensation - Stock Options Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Outstanding awards (in shares) 132  
Outstanding, weighted-average exercise price (in dollars per share) $ 37.99  
Outstanding, weighted-average remaining contractual life (Year) 7 years 3 months 18 days 7 years 6 months
Outstanding, aggregate intrinsic value $ 1 $ 69
Options granted (in shares) 42  
Options granted, weighted-average exercise price (in dollars per share) $ 1.67  
Options exercised (in shares) 0  
Options forfeited/cancelled (in shares) (19)  
Options forfeited/cancelled, weighted-average exercise price (in dollars per share) $ 62.39  
Outstanding awards (in shares) 125 132
Outstanding, weighted-average exercise price (in dollars per share) $ 31.15 $ 37.99
Vested and expected to vest (in shares) 119  
Vested and expected to vest, weighted-average exercise price (in dollars per share) $ 32.4  
Vested and expected to vest, weighted-average remaining contractual life (Year) 7 years 3 months 18 days  
Vested and expected to vest, aggregate intrinsic value $ 1  
Vested and exercisable (in shares) 63  
Exercisable, weighted-average exercise price (in dollars per share) $ 56.85  
Exercisable, weighted-average remaining contractual life (Year) 5 years 8 months 12 days  
Restricted Stock Units (RSUs) [Member]    
Restricted stock units granted (in shares) 5  
Restricted stock units vested (in shares) (5)  
Restricted stock units cancelled (in shares) (30)