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NATURE OF OPERATIONS - IPO and Corporate Conversion (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended
Apr. 17, 2019
Jan. 01, 2018
Jan. 31, 2019
Dec. 31, 2018
Nature of operations        
Shares of its common stock issued   20,000,000    
Shares repurchased 300,000      
Share repurchase price (in dollars per share) $ 10.20      
Stock Repurchase Program, Authorized Amount $ 10,000      
Initial public offering (“IPO”)        
Nature of operations        
Shares of its common stock issued     600,000 4,000,000
Share price (in dollars per share)     $ 12.00 $ 12.00
Underwriting discounts and offering expenses paid     $ 505 $ 4,504
Proceeds from IPO net of underwriting discounts and offering expenses     $ 6,695 $ 43,492