INCOME TAXES - Schedule of Provision for (Benefit from) Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ (466)us-gaap_CurrentFederalTaxExpenseBenefit	$ (251)us-gaap_CurrentFederalTaxExpenseBenefit
State	28	52	3
Foreign	160us-gaap_CurrentForeignTaxExpenseBenefit	(125)us-gaap_CurrentForeignTaxExpenseBenefit	254us-gaap_CurrentForeignTaxExpenseBenefit
Total current	188us-gaap_CurrentIncomeTaxExpenseBenefit	(539)us-gaap_CurrentIncomeTaxExpenseBenefit	6us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	0	0	0
State	0	0	0
Foreign	151	(3)	478
Total deferred	151us-gaap_DeferredIncomeTaxExpenseBenefit	(3)us-gaap_DeferredIncomeTaxExpenseBenefit	478us-gaap_DeferredIncomeTaxExpenseBenefit
Provisions for (benefit from) income taxes	$ 339us-gaap_IncomeTaxExpenseBenefit	$ (542)us-gaap_IncomeTaxExpenseBenefit	$ 484us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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