RELATED PARTY TRANSACTIONS (Details Textual)	3 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Oct. 31, 2014 USD ($) a	Oct. 03, 2014 USD ($)
Related Party Transaction [Line Items]
Other research and development	$ 11,230,415	$ 8,279,431
Prepaid Research And Development	10,979,437		$ 9,151,142
Prepaid Rent	1,151,163		0
LFB License Agreement [Member]
Related Party Transaction [Line Items]
Other research and development	0	$ 161,000
Shared Services Agreement [Member]
Related Party Transaction [Line Items]
Costs and Expenses, Related Party	100,000
Global Collaboration Agreement [Member]
Related Party Transaction [Line Items]
Accounts Payable	100,000
Opus [Member]
Related Party Transaction [Line Items]
Accounts Payable	100,000
Costs and Expenses, Related Party	100,000
LFB Group [Member]
Related Party Transaction [Line Items]
Accounts Payable	100,000		2,100,000
Prepaid Research And Development	4,400,000		$ 3,000,000
Desk Agreement [Member]
Related Party Transaction [Line Items]
Costs and Expenses, Related Party	$ 100,000
Average Annual Rental Payments					$ 1,100,000
Security Deposit				$ 600,000
Percentage of Occupancy	45.00%				45.00%
Accounts Payable, Related Parties, Current	$ 1,000,000
Lessee Leasing Arrangements, Operating Leases, Term of Contract	15 years
Area of Land | a				24,000
Operating Lease, Initial Commitment Period	0 years
Prepaid Rent	$ 1,200,000