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STOCK-BASED COMPENSATION PLANS - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Number of Shares    
Outstanding at the beginning of the period (in shares) 184,169  
Exercised (in shares) (355)  
Expired (in shares) (3,470)  
Outstanding at the end of the period (in shares) 180,344  
Vested or expected to vest (in shares) 180,344  
Exercisable (in shares) 180,344  
Weighted Average Exercise Price    
Outstanding (in dollars per share) $ 13.23 $ 13.25
Exercised (in dollars per share) 1.95  
Expired (in dollars per share) 15.62  
Vested or expected to vest (in dollars per share) 13.23  
Exercisable (in dollars per share) $ 13.23  
Weighted Average Remaining Contractual Term (years)    
Outstanding 2 years 4 months 6 days  
Vested or expected to vest 2 years 4 months 6 days  
Exercisable 2 years 4 months 6 days  
Aggregate Intrinsic Value (in thousands)    
Outstanding (in dollars per share) $ 50  
Vested or expected to vest (in dollars per share) 50  
Exercisable (in dollars per share) $ 50