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Significant Customers that Accounted for More than Ten Percentage of Total Product Revenue (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Etablissement Francais du Sang
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue 24.00% 18.00% 24.00% 17.00%
Advanced Technology Company KSC
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue 18.00%      
Medical Device APS
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue 10.00%      
Delrus Inc.
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue   17.00%   29.00%
Bravo Pacific Limited
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue   14.00%    
AUM+ LTD
       
Revenue, Major Customer [Line Items]        
Percentage of revenue derived from significant customer from Company's total product revenue   10.00%