Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Gross Unrecognized Tax Benefits (Detail)

v2.4.1.9
Income Taxes - Summary of Gross Unrecognized Tax Benefits (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]    
Balance at beginning of period $ 1,865us-gaap_UnrecognizedTaxBenefits $ 1,747us-gaap_UnrecognizedTaxBenefits
Increases related to prior year tax positions   65us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Increases related to tax positions 126us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 53us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Balance at end of period $ 1,991us-gaap_UnrecognizedTaxBenefits $ 1,865us-gaap_UnrecognizedTaxBenefits