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Fair Value Measurement - Schedule of Conclusion Reached (Detail) - USD ($)
$ in Thousands
Jan. 01, 2015
Dec. 31, 2014
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative Liability $ 177  
Outstanding Warrants | Significant Unobservable Inputs (Level 3)    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative Liability   $ 177