RELATED PARTY TRANSACTIONS (Details Narrative)	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) ft² shares	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) ft² $ / shares shares	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) shares
Related Party Transaction [Line Items]
Other research and development	$ 25,439,477	$ 12,966,574	$ 45,815,271	$ 24,196,989
Prepaid Research And Development	$ 9,662,237		$ 9,662,237		$ 5,678,755
Common stock issued | shares	68,127,202		68,127,202		56,820,422
LFB License Agreement [] [Member]
Related Party Transaction [Line Items]
Accounts Payable	$ 0		$ 0		$ 400,000
Costs and Expenses, Related Party	400,000	2,300,000	500,000	2,300,000
Prepaid Research And Development	$ 1,800,000		$ 1,800,000		1,300,000
Common stock issued | shares	5,000,000		5,000,000
Warrant to purchase common stock | shares	2,500,000		2,500,000
Common stock purchase price | $ / shares			$ .001
Shared Services Agreement [Member]
Related Party Transaction [Line Items]
Costs and Expenses, Related Party	$ 400,000	$ 200,000	$ 700,000	400,000
Office Agreement [Member]
Related Party Transaction [Line Items]
Accounts Payable	500,000		500,000
Average Annual Rental Payments	$ 1,100,000		$ 1,100,000
Percentage of Occupancy	45.00%		45.00%
Area of Land | ft²	24,000		24,000
Operating Lease, Initial Commitment Period			15 years
Rent expense			$ 700,000
Deferred rent	$ 1,300,000		1,300,000
Build out costs			100,000
JBET Agreement [Member]
Related Party Transaction [Line Items]
Accounts Payable	800,000		800,000		$ 800,000
Sublicense Fee paid			$ 1,000,000
Opus [Member]
Related Party Transaction [Line Items]
Costs and Expenses, Related Party	$ 20,000			$ 100,000