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Significant Customers that Accounted for More than Ten Percentage of Total Product Revenue (Detail) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Etablissement Francais du Sang |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 20.00% |  | 24.00% |  | 20.00%
Movaco, S.A. |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 19.00% |  | 21.00% |  | 19.00%
Delrus Inc. |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 12.00% |  | 12.00% |  | 16.00%
Service Francophone Du Sang |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Percentage of revenue derived from significant customer from Company's total product revenue | 0.00% | [1] | 0.00% | [1] | 12.00%
[1] | Represents an amount less than 10% of product revenue.

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- Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration