INCOME TAXES (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred income tax assets:
U.S. Federal NOL	$ 36,500	$ 15,050
U.S. states NOL	1,261
Derivative liability	28,139	$ 57,871
Stock-based compensation	4,546	2,647
U.S. Federal tax credits	3,000	3,000
Other	353	1,185
Total deferred tax assets	73,799	79,753
Less valuation allowance	(66,677)	(70,985)
Net deferred tax assets	7,122	8,768
Deferred income tax liabilities:
Intangible assets	(9,445)	(11,678)
Undistributed earnings of U.K. subsidiaries	(1,467)	(1,400)
Original issue discount on debt instuments	(528)	(1,103)
Total deferred tax liabilities	(11,440)	(14,181)
Net deferred tax liability	$ (4,318)	$ (5,413)