XML 18 R50.htm IDEA: XBRL DOCUMENT v2.4.0.8
Related-Party Transactions - Additional Information (Detail)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Related Party Transaction [Line Items]    
Percentage of related-party revenue 39.00% 38.00%
Sanofi [Member]
   
Related Party Transaction [Line Items]    
Ownership percentage of a related party in a customer of the company 100.00%