v3.2.0.727
Fair Value Measurement of Financial Assets and Liabilities - Additional Information (Detail) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial Assets measured at fair value on a recurring basis $ 0 $ 0
Financial Liabilities measured at fair value on a recurring basis $ 0 $ 0