Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Restricted Stock Activity (Details)

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STOCK-BASED COMPENSATION - Restricted Stock Activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Service-based Awards      
Number of Shares      
Outstanding (in shares) 41,398    
Shares granted (in shares) 460,382 174,720 105,035
Shares forfeited (in shares) (271)    
Shares vested (in shares) (232,907)    
Outstanding (in shares) 268,602 41,398  
Weighted- Average Price      
Beginning of the Year (in dollars per share) $ 24.10    
Shares granted (in dollars per share) 9.15 $ 21.40 $ 26.70
Shares forfeited (in dollars per share) 24.50    
Shares vested (in dollars per share) 10.32    
End of the Year (in dollars per share) $ 10.44 $ 24.10  
Service and Performance-based Awards      
Number of Shares      
Outstanding (in shares) 37,500    
Shares granted (in shares) 0    
Shares forfeited (in shares) 0    
Shares vested (in shares) (21,250)    
Outstanding (in shares) 16,250 37,500  
Weighted- Average Price      
Beginning of the Year (in dollars per share) $ 27.00    
Shares granted (in dollars per share) 0    
Shares forfeited (in dollars per share) 0    
Shares vested (in dollars per share) 27.00    
End of the Year (in dollars per share) $ 27.00 $ 27.00  
Service and Market-based Awards      
Number of Shares      
Outstanding (in shares) 118,962    
Shares granted (in shares) 0    
Shares forfeited (in shares) (106,800)    
Shares vested (in shares) (6,917)    
Outstanding (in shares) 5,245 118,962  
Weighted- Average Price      
Beginning of the Year (in dollars per share) $ 18.00    
Shares granted (in dollars per share) 0    
Shares forfeited (in dollars per share) 18.20    
Shares vested (in dollars per share) 16.70    
End of the Year (in dollars per share) $ 16.70 $ 18.00  
Service, Performance, and Market-based Awards      
Number of Shares      
Outstanding (in shares) 70,800    
Shares granted (in shares) 0    
Shares forfeited (in shares) 0    
Shares vested (in shares) (31,600)    
Outstanding (in shares) 39,200 70,800  
Weighted- Average Price      
Beginning of the Year (in dollars per share) $ 9.80    
Shares granted (in dollars per share) 0    
Shares forfeited (in dollars per share) 0    
Shares vested (in dollars per share) 9.80    
End of the Year (in dollars per share) $ 9.80 $ 9.80