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Fair Value Measurement - Fair Value of Derivative Liability (Detail)
$ in Thousands
Dec. 31, 2014
USD ($)
Schedule of Fair Value Measurement Details Fair Value Of Derivative Liability [Line Items]  
Included in other current liabilities: Derivative liability $ 11
Fair Value, Inputs, Level 3 [Member]  
Schedule of Fair Value Measurement Details Fair Value Of Derivative Liability [Line Items]  
Included in other current liabilities: Derivative liability $ 11