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Note 15 - Equity-based Compensation - Stock Options Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Outstanding awards (in shares) 4,449,000    
Outstanding, weighted-average exercise price (in dollars per share) $ 1.39    
Outstanding, weighted-average remaining contractual life (Year) 7 years 9 months 18 days   7 years 7 months 6 days
Outstanding, aggregate intrinsic value $ 135   $ 460
Options granted (in shares) 626,000 291,000  
Options granted, weighted-average exercise price (in dollars per share) $ 0.28    
Restricted stock units granted (in shares) 180,000 1,228,359  
Options forfeited/cancelled (in shares) (362,000)    
Options forfeited/cancelled, weighted-average exercise price (in dollars per share) $ 3.50    
Outstanding awards (in shares) 4,743,000   4,449,000
Outstanding, weighted-average exercise price (in dollars per share) $ 1.07   $ 1.39
Vested and expected to vest (in shares) 3,492,000    
Vested and expected to vest, weighted-average exercise price (in dollars per share) $ 1.42    
Vested and expected to vest, weighted-average remaining contractual life (Year) 7 years 4 months 24 days    
Vested and expected to vest, aggregate intrinsic value $ 20    
Vested (in shares) 2,068,000    
Vested, weighted-average exercise price (in dollars per share) $ 2.06    
Vested, weighted-average remaining contractual life (Year) 6 years 3 months 18 days    
Exercisable (in shares) 2,068,000    
Exercisable, weighted-average exercise price (in dollars per share) $ 2.06    
Exercisable, weighted-average remaining contractual life (Year) 6 years 3 months 18 days    
Restricted Stock Units (RSUs) [Member]      
Restricted stock units granted (in shares) 180,000    
Restricted stock units vested (in shares) (120,000)    
Restricted stock units cancelled (in shares) (30,000)