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Segment Reporting - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 Segment | Dec. 31, 2012 | Dec. 31, 2011 Roche [Member] | Dec. 31, 2011 UCB [Member] | Dec. 31, 2013 Revenue [Member] Roche [Member] | Dec. 31, 2012 Revenue [Member] Roche [Member] | Dec. 31, 2013 Revenue [Member] UCB [Member] | Dec. 31, 2012 Revenue [Member] UCB [Member] | Dec. 31, 2013 Revenue [Member] AstraZeneca [Member] | Dec. 31, 2013 Revenue [Member] Bayer [Member] | Dec. 31, 2012 Revenue [Member] Affymax, Inc. [Member] | Dec. 31, 2013 United States [Member] | Dec. 31, 2012 United States [Member] | Dec. 31, 2013 India [Member] | Dec. 31, 2012 India [Member]
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating business segment | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of components within business segment | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage revenue from clients |  |  | 16.00% | 27.00% | 28.00% | 23.00% | 21.00% | 30.00% | 17.00% | 10.00% | 11.00% |  |  |  |
Property and equipment, net | $ 66,974 | $ 72,215 |  |  |  |  |  |  |  |  |  | $ 57,300 | $ 62,500 | $ 7,700 | $ 9,700
Percentage of net book value of property and equipment |  |  |  |  |  |  |  |  |  |  |  | 88.00% | 87.00% | 12.00% | 13.00%

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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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