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Percentage of Revenue from Significant Customers (Detail) (Sales Revenue) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Orencia Royalties from Bristol |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue |  | 26.00% |  | 25.00%
Bioprocessing Customer A |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue | 30.00% | 28.00% | 39.00% | 35.00%
Bioprocessing Customer B |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue | 23.00% | 10.00% | 22.00% | 12.00%
Bioprocessing Customer C |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from significant customers as a percentage of total revenue | 20.00% | 20.00% | 16.00% | 15.00%

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