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PROPERTY AND EQUIPMENT - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
ft²
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 12,456 $ 8,612 $ 4,919
Ewing, New Jersey Properties [Member]      
Property, Plant and Equipment [Line Items]      
Area of facility acquired | ft² 88,000    
Cost of facility acquired $ 8,200