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	Jan. 31, 2011	Dec. 31, 2015	Dec. 31, 2014
OTHER LONG-TERM LIABILITIES
Deferred Rent		$ 482					$ 409	$ 482
Net Deferred Tax Liability related to IPR&D		4,661					4,661	4,661
Deferred Income from Sale of Tax Benefits		4,015					12,219	4,015
Deferred Revenue		5,297					4,368	5,297
Total		14,455					21,657	14,455
Less Current Portion		(2,592)					(4,418)	(2,592)
Long-Term Portion		11,863					$ 17,239	11,863
Amount at which New Jersey tax benefit agreed to be sold	$ 9,800	1,900	$ 1,100	$ 800	$ 800	$ 600
Amount of sale of New Jersey tax benefit	$ 9,200	$ 1,800	$ 1,000	$ 800	$ 700	$ 500
Period for which base of operations must be maintained							5 years
Other income related to sale of tax benefits							$ 1,000	$ 400