Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]    
Liability for unrecognized tax benefit, including related estimates of penalties and interest $ 0us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease $ 0us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
Income tax provision (benefit) $ 47,000us-gaap_IncomeTaxExpenseBenefit $ 24,000us-gaap_IncomeTaxExpenseBenefit
Projected annual effective tax rate (0.90%)us-gaap_EffectiveIncomeTaxRateContinuingOperations (0.50%)us-gaap_EffectiveIncomeTaxRateContinuingOperations
Statutory tax rate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate