PROPERTY AND EQUIPMENT - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)
Property Plant And Equipment [Line Items]
Depreciation expense	$ 3,200	$ 1,700	$ 8,958	$ 6,094
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