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COMMITMENTS AND CONTINGENCIES - Lease payments (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
COMMITMENTS AND CONTINGENCIES    
Rent expense $ 166,000 $ 125,000
Operating Leases    
2016 599,000  
2017 867,000  
2018 772,000  
2019 615,000  
2020 370,000  
Thereafter 310,000  
Total $ 3,533,000