OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands	1 Months Ended					12 Months Ended
	Nov. 30, 2015	Dec. 31, 2014	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OTHER LONG-TERM LIABILITIES
Deferred Rent						$ 398	$ 409
Net Deferred Tax Liability related to IPR&D (Note 17)						28,054	4,661
Deferred Income from Sale of Tax Benefits						9,436	12,219
Needham Expansion Restructuring (Note 18)						1,154
Long-Term Severance (Note 17)						539
Contingent Milestones (Note 17)						44,200
Deferred Revenue						3,749	4,368
Total						87,530	21,657
Less Current Portion						(4,826)	(4,418)
Long-Term Portion						$ 82,704	17,239
Amount at which New Jersey tax benefit agreed to be sold	$ 9,800	$ 1,900	$ 1,100	$ 800	$ 800
Amount of sale of New Jersey tax benefit	$ 9,200	$ 1,800	$ 1,000	$ 800	$ 700
Period for which base of operations must be maintained						5 years
Other income related to sale of tax benefits						$ 2,800	$ 1,000	$ 400