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NATURE OF OPERATIONS - IPO and Corporate Conversion (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Apr. 17, 2019
Jan. 01, 2018
Jan. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Nature of operations            
Shares issued upon incorporation (in shares)   20,000,000        
Offering costs         $ 505 $ 4,504
Shares repurchased 300,000          
Share repurchase price (in dollars per share) $ 10.20          
Stock Repurchase Program, Authorized Amount $ 10,000          
IPO            
Nature of operations            
Shares issued from sale of common stock     600,000 4,000,000    
Share price (in dollars per share)     $ 12.00 $ 12.00   $ 12.00
Offering costs     $ 505 $ 4,504    
Proceeds from IPO net of underwriting discounts and offering expenses     $ 6,695 $ 43,492