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Long-Term Debt - Principal Amount and Unamortized Original Issue Discount (Detail) - Term Loan [Member] - USD ($)
$ in Thousands
Dec. 31, 2015
May 23, 2013
Debt Instrument [Line Items]    
Principal amount $ 7,000 $ 20,000
Less: Unamortized discount (149)  
Term Loan, net of unamortized discount $ 6,851