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Note 15 - Equity-based Compensation - Stock Options Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Outstanding awards (in shares) 3,165,000  
Outstanding, weighted-average exercise price (in dollars per share) $ 2.05  
Outstanding, weighted-average remaining contractual life (Year) 7 years 7 months 6 days 7 years 7 months 6 days
Outstanding, aggregate intrinsic value $ 460 $ 189
Options granted (in shares) 516,000  
Options granted, weighted-average exercise price (in dollars per share) $ 0.66  
Restricted stock units granted (in shares) 1,528,000  
Options forfeited/cancelled (in shares) (272,000)  
Options forfeited/cancelled, weighted-average exercise price (in dollars per share) $ 2.35  
Outstanding awards (in shares) 4,449,000 3,165,000
Outstanding, weighted-average exercise price (in dollars per share) $ 1.39 $ 2.05
Vested and expected to vest (in shares) 4,125,000  
Vested and expected to vest, weighted-average exercise price (in dollars per share) $ 1.46  
Vested and expected to vest, weighted-average remaining contractual life (Year) 7 years 6 months  
Vested and expected to vest, aggregate intrinsic value $ 406  
Vested (in shares) 2,150,000  
Vested, weighted-average exercise price (in dollars per share) $ 2.42  
Vested, weighted-average remaining contractual life (Year) 5 years 4 months 24 days  
Vested, aggregate intrinsic value $ 8  
Exercisable (in shares) 2,150,000  
Exercisable, weighted-average exercise price (in dollars per share) $ 2.42  
Exercisable, weighted-average remaining contractual life (Year) 5 years 10 months 24 days  
Exercisable, aggregate intrinsic value $ 8  
Restricted Stock Units (RSUs) [Member]    
Restricted stock units granted (in shares) 1,200,000  
Restricted stock units vested (in shares) (488,000)