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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Agreement
Mar. 31, 2013
Commitments And Contingencies Disclosure [Abstract]    
Lease expiration 2019  
Lease expiration extension Mar. 31, 2024  
Rent expense $ 231 $ 223
Milestone payments from the Company 19,000  
Number of additional license agreements 2  
License agreements fee $ 2,300