COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Dec. 31, 2013	Apr. 30, 2012 ft² item	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Non-Cancelable Operating Lease
2017 (remainder)			$ 1,082		$ 1,082
2018			3,909		3,909
2019			2,433		2,433
2020			1,972		1,972
2021			1,673		1,673
Thereafter			1,572		1,572
Total			12,641		12,641
Lease of cars
Non-Cancelable Operating Lease
Rent expense			800	$ 800	2,400	$ 2,400
Office and laboratory
Non-Cancelable Operating Lease
Rent expense			100	$ 100	400	$ 400
New lease Newark
Non-Cancelable Operating Lease
Total			8,300		8,300
Square feet agreed to lease | ft²		52,500
Additional square feet obligated lease | ft²		8,000
Number of lease renewal terms | item		1
Lease renewal option period		5 years
Lease renewal, minimum notice period prior to lease expiration		12 months
Deferred rent			1,500		1,500		$ 1,600
Enterprise FM Trust
Non-Cancelable Operating Lease
Total			$ 4,200		$ 4,200
Enterprise FM Trust | Minimum
Non-Cancelable Operating Lease
Lease terms	18 months
Enterprise FM Trust | Maximum
Non-Cancelable Operating Lease
Lease terms	48 months