COMMITMENTS AND CONTINGENCIES (Details)		1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2018 USD ($) ft² item	Apr. 30, 2012 ft²	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Non-Cancelable Operating Lease
2018			$ 1,367,000		$ 1,367,000
2019			2,687,000		2,687,000
2020			2,545,000		2,545,000
2021			2,371,000		2,371,000
2022			2,188,000		2,188,000
Thereafter			633,000		633,000
Total			11,791,000		11,791,000
Lease of cars
Non-Cancelable Operating Lease
Rent expense			200,000	$ 800,000	700,000	$ 1,600,000
Office and laboratory
Non-Cancelable Operating Lease
Rent expense			500,000	$ 100,000	900,000	$ 300,000
New lease Newark
Non-Cancelable Operating Lease
Total			7,200,000		7,200,000
Square feet agreed to lease | ft²		52,500
Additional square feet obligated lease | ft²		8,000
Deferred rent			1,600,000		1,600,000		$ 1,400,000
Lake Forest Illinois Building
Non-Cancelable Operating Lease
Total			3,300,000		3,300,000
Square feet agreed to lease | ft²	31,000
Lease terms	5 years 6 months
Number of renewal periods | item	1
Renewal terms	5 years
Written notice period (in months)	12 months
Temporary space available to use | ft²	6,700
Initial annual base rent (per square foot)	$ 18.00
Annual increase in base rent (per square foot)	0.50
Tenant improvement allowance (per square foot)	$ 28.00
Enterprise FM Trust
Non-Cancelable Operating Lease
Total			$ 1,300,000		$ 1,300,000
Enterprise FM Trust | Minimum
Non-Cancelable Operating Lease
Lease terms					18 months
Enterprise FM Trust | Maximum
Non-Cancelable Operating Lease
Lease terms					48 months