INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 159,722	$ 161,422
Reserves not currently deductible	6,106	7,547
Tax credit carryforwards	849	849
Depreciation	5,073	6,006
Deferred revenue	1,749	1,186
Other	1,599	(161)
Total deferred tax asset	175,098	176,849
Valuation allowance	(173,081)	(176,786)
Net deferred tax asset	2,017	63
Deferred tax liability	(2,291)	(192)
Net deferred tax asset (liability)	$ (274)	$ (129)