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Leases - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 28, 2011 sqft | Sep. 30, 2009 Pfizer, Inc. [Member] sqft
Leases [Line Items] |  |  |  |  |  |
Percentage ceiling on rent increases, annually, capital lease | 3.00% |  |  |  |  |
San Carlos facility capital leases, termination date | Oct. 05, 2016 |  |  |  |  |
Impairment charge |  |  |  | $ 12.6 |  |
Net book value of assets | 1.0 | 1.4 |  |  |  |
Book value of assets, gross | 2.3 | 2.3 |  |  |  |
Future minimum rental receipts under the San Carlos facility subleases | 7.4 |  |  |  |  |
Operating sublease |  |  |  |  |  | 102,283
Operating Sublease term commenced start date | August 2010 |  |  |  |  |
Operating Sublease term commenced period | 114 months |  |  |  |  |
Operating Sublease term commenced end date | January 31, 2020 |  |  |  |  |
Additional area included in operating sublease due to expansion of Mission Bay Facility |  |  |  |  | 24,002 |
Operating Sublease term commenced period expansion | December 28, 2011 |  |  |  |  |
Operating Sublease term commenced end date expansion | January 31, 2020 |  |  |  |  |
Rent expense for operating leases | $ 2.9 | $ 2.8 | $ 2.4 |  |  |

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