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COMMITMENTS AND CONTINGENCIES - Lease payments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
COMMITMENTS AND CONTINGENCIES        
Rent expense $ 332,000 $ 294,000 $ 649,000 $ 593,000
Operating Leases        
Remainder of 2017 439,000   439,000  
2018 880,000   880,000  
2019 620,000   620,000  
2020 374,000   374,000  
2021 175,000   175,000  
Thereafter 143,000   143,000  
Total $ 2,631,000   $ 2,631,000