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Related Parties - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2013
Mr. Peter Gray
USD ($)
Dec. 31, 2013
Mr. Peter Gray
EUR (€)
Dec. 31, 2013
Dr. John Climax
USD ($)
Dec. 31, 2013
Dr. John Climax
EUR (€)
Related Party Transaction [Line Items]        
Related party transaction amounts $ 350,000 € 265,000 $ 346,000 € 262,500
Term of agreement Two years Two years Three years Three years
Related party agreement expiration date     Dec. 31, 2012 Dec. 31, 2012