Income Tax Expense (Income and Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S.	$ (9,799)	$ (4,123)	$ (22,270)
Foreign	(22,681)	(11,955)	(12,973)
Net income (loss) before income tax	(32,480)	(16,078)	(35,243)
Assets, Current [Abstract]
Federal	(20)us-gaap_CurrentFederalTaxExpenseBenefit	51us-gaap_CurrentFederalTaxExpenseBenefit	30us-gaap_CurrentFederalTaxExpenseBenefit
State	181	138	176
Foreign	34us-gaap_CurrentForeignTaxExpenseBenefit	(300)us-gaap_CurrentForeignTaxExpenseBenefit	319us-gaap_CurrentForeignTaxExpenseBenefit
Total	195us-gaap_CurrentIncomeTaxExpenseBenefit	(111)us-gaap_CurrentIncomeTaxExpenseBenefit	525us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Tax Assets, Net [Abstract]
Federal	(10)	(116)	0
State	0	(16)	0
Foreign	(247)	233	6
Total deferred	(257)us-gaap_DeferredIncomeTaxExpenseBenefit	101us-gaap_DeferredIncomeTaxExpenseBenefit	6us-gaap_DeferredIncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal	(30)	(65)	30
State	181	122	176
Foreign	(213)	(67)	325
Income tax (benefit) expense	$ (62)us-gaap_IncomeTaxExpenseBenefit	$ (10)us-gaap_IncomeTaxExpenseBenefit	$ 531us-gaap_IncomeTaxExpenseBenefit

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