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Income Taxes - Expense for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expenses [Line Items]
Current	$ 499us-gaap_CurrentIncomeTaxExpenseBenefit	$ 140us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	58us-gaap_DeferredIncomeTaxExpenseBenefit	259us-gaap_DeferredIncomeTaxExpenseBenefit
Income Tax Expense (Benefit), Total	$ 557us-gaap_IncomeTaxExpenseBenefit	$ 399us-gaap_IncomeTaxExpenseBenefit

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

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