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Percentage of Accounts Receivable by Significant Customers (Detail) (Accounts Receivable)	Mar. 31, 2013	Dec. 31, 2012
Orencia Royalties from Bristol
Concentration Risk [Line Items]
Accounts receivable, percentage by customer	36.00%	31.00%
Bioprocessing Customer A
Concentration Risk [Line Items]
Accounts receivable, percentage by customer	36.00%	21.00%
Pfizer Inc
Concentration Risk [Line Items]
Accounts receivable, percentage by customer		38.00%

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- Definition

Concentration of Risk Accounts Receivable Percentage

+ References

No definition available.

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