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STOCKHOLDERS' EQUITY (Common and Preferred Stock) (Details)
 6 Months Ended
Jun. 30, 2020
vote
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Common Stock    
Maximum individual common stock ownership (in hundredths) 9.80%  
Preferred Stock    
Preferred Stock    
Preferred shares authorized (in shares) 1,000,000  
Common Class A    
Common Stock    
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Par value (in dollars per share) | $ / shares $ 0.01 $ 0.01
Common stock shares issued (in shares) 8,925,036 8,881,842
Number of votes holder is entitled to | vote 1  
Common Class B    
Common Stock    
Common stock, shares authorized (in shares) 1,000  
Par value (in dollars per share) | $ / shares $ 0.01  
Common stock shares issued (in shares) 0  
Number of votes holder is entitled to | vote 1  
Common Class C    
Common Stock    
Common stock, shares authorized (in shares) 9,000,000