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Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Amortization expense related to intangible assets:  
Remainder of 2015 $ 38us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 51us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 51us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 51us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 39us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Total $ 230us-gaap_FiniteLivedIntangibleAssetsNet