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STOCK-BASED COMPENSATION, Summary of Activity for Non-vested Restricted Stock Unit Awards (Details) - Restricted Stock and RSUs [Member] - $ / shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Shares [Roll Forward]    
Balance, beginning (in shares) 657,717 36,803
Granted (in shares) 28,191 0
Forfeited (in shares) (5,319)  
Vested (in shares) (1,408) (16,648)
Balance, ending (in shares) 679,181 20,155
Grant Fair Value [Abstract]    
Balance, beginning (in dollars per share) $ 7.39 $ 7.93
Granted (in dollars per share) 5.64 0
Forfeited (in dollars per share) 5.64  
Vested (in dollars per share) 7.72 8.22
Balance, ending (in dollars per share) $ 7.39 $ 7.93