Revenue Accounted for 10% or More of Total Revenues (Detail)	12 Months Ended
Dec. 31, 2013 Bristol-Myers Squibb Company ("BMS") and Pfizer Inc. ("Pfizer")	Dec. 31, 2013 Bayer Pharma, AG ('Bayer") and Janssen Pharmaceuticals, Inc. ("Janssen")	Dec. 31, 2013 Daiichi Sankyo, Inc ("Daiichi")	Dec. 31, 2012 Novartis AG ("Novartis")	Dec. 31, 2011 Novartis AG ("Novartis")	Dec. 31, 2011 Biogen Idec	Dec. 31, 2011 Merck & Co., Inc.
Concentration Risk [Line Items]
Percentage of major customers revenue accounted for 10% or more of total revenues	38.00%	37.00%	23.00%	97.00%	12.00%	48.00%	40.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

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-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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