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Acquisitions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Mar. 12, 2013
Alter [Member]
Jun. 30, 2013
Alter [Member]
Mar. 31, 2013
Alter [Member]
Dec. 31, 2013
Alter [Member]
Aug. 29, 2012
Plasmart, Inc. [Member]
Dec. 31, 2012
Plasmart, Inc. [Member]
Dec. 31, 2013
Plasmart, Inc. [Member]
Business Acquisition [Line Items]                    
Acquisition purchase price, net of cash acquired       $ 2,426       $ 22,607    
Acquisition date             Mar. 12, 2013     Aug. 29, 2012
Total cash paid, net of cash acquired 2,326 22,607    2,426 2,058 2,426   22,607    
Cash acquired from acquisition             21      
Remaining cash to be paid             368      
Holdback provisions paid             123      
Acquisition related costs               1,258    
Working capital adjustments                 1,778  
Step-up inventory               $ 303