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Significant Customers that Accounted for More than Ten Percentage of Total Product Revenue (Detail) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Etablissement Francais du Sang |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 20.00% |  | 22.00% |  | 18.00% |  | 23.00% |
Movaco, S.A. |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 19.00% |  | 19.00% |  | 16.00% |  | 19.00% |
Bravo Pacific Limited |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 11.00% |  |  | [1] |  | [1] |  | [1]
Advanced Technology Comp. KSC |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 10.00% |  |  | [1] |  | [1] |  | [1]
AUM+ LTD |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue |  | [1] | 13.00% |  |  | [1] |  | [1]
[1] | Represents an amount less than 10% of product revenue.

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- Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration