RELATED PARTY TRANSACTIONS (Details Narrative) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) ft²	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) ft² $ / shares shares	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Other research and development	$ 34,812	$ 25,440	$ 65,971	$ 45,815
Office Agreement [Member]
Related Party Transaction [Line Items]
Accounts payable	$ 400		$ 400
Percentage of occupancy	45.00%		45.00%
Area of land | ft²	24,000		24,000
Average annual rental payments	$ 1,100		$ 1,100
Rent expense	300		700
Deferred rent	$ 1,400		1,400
Operating lease, initial commitment period	15 years
JBET Agreement [Member]
Related Party Transaction [Line Items]
Accounts payable	$ 100	800	100	800	$ 700
LFB License Agreement [] [Member]
Related Party Transaction [Line Items]
Other research and development			38	400
Accounts payable	37		$ 37		$ 0
Common stock issued | shares			5,000,000
Warrant to purchase common stock | shares			2,500,000
Price per share | $ / shares			$ 0.001
Shared Services Agreement [Member]
Related Party Transaction [Line Items]
Costs and expenses, related party	$ 700	$ 400	$ 1,100	$ 700