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PROPERTY AND EQUIPMENT - Additional Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
ft²
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
ft²
Jun. 30, 2018
USD ($)
Property Plant And Equipment [Line Items]        
Depreciation expense $ 3,000 $ 2,200 $ 5,799 $ 4,422
Ewing, New Jersey Properties [Member]        
Property Plant And Equipment [Line Items]        
Area of facility acquired | ft² 88,000   88,000  
Cost of facilty acquired     $ 8,200