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Note 15 - Equity-based Compensation - Stock Options Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Outstanding awards (in shares) 4,449  
Outstanding, weighted-average exercise price (in dollars per share) $ 1.39  
Outstanding, weighted-average remaining contractual life (Year) 7 years 7 months 6 days  
Outstanding, aggregate intrinsic value $ 356 $ 460
Options granted (in shares) 332  
Options granted, weighted-average exercise price (in dollars per share) $ 0.30  
Options forfeited/cancelled (in shares) (21)  
Options forfeited/cancelled, weighted-average exercise price (in dollars per share) $ 10.94  
Outstanding awards (in shares) 4,760  
Outstanding, weighted-average exercise price (in dollars per share) $ 1.27  
Vested and expected to vest (in shares) 4,416  
Vested and expected to vest, weighted-average exercise price (in dollars per share) $ 1.33  
Vested and expected to vest, weighted-average remaining contractual life (Year) 7 years 6 months  
Vested and expected to vest, aggregate intrinsic value $ 313  
Vested (in shares) 2,218  
Vested, weighted-average exercise price (in dollars per share) $ 2.30  
Vested, weighted-average remaining contractual life (Year) 5 years 9 months 18 days  
Vested, aggregate intrinsic value $ 0  
Exercisable (in shares) 2,218  
Exercisable, weighted-average exercise price (in dollars per share) $ 2.30  
Exercisable, weighted-average remaining contractual life (Year) 5 years 9 months 18 days  
Exercisable, aggregate intrinsic value $ 0