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Liability Related to Sale of Future Royalties - Additional Information (Detail) (USD $) | 12 Months Ended |  |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Maximum [Member] | Mar. 31, 2013 Milestone Scenario One [Member] | Dec. 31, 2013 Milestone Scenario One [Member] | Dec. 31, 2013 Milestone Scenario Two [Member] | Dec. 31, 2013 Milestone Scenario Two [Member] | Feb. 24, 2012 Purchase and Sale Agreement with RPI [Member] | Dec. 31, 2013 MIRCERA [Member] | Dec. 31, 2013 CIMZIA and MIRCERA [Member] | Dec. 31, 2012 CIMZIA and MIRCERA [Member]
Liability Related to Sale of Future Royalties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of royalty rights |  |  |  |  |  |  |  | $ 124,000,000 |  |  |
Transaction costs related to sale of potential future royalties |  |  |  |  |  |  |  | 4,400,000 |  |  |
Increase in non-cash royalty revenue in 2013 based on estimates of net sales | 4,600,000 |  |  |  |  |  |  |  |  |  |
Non-cash royalties from net sales |  |  |  |  |  |  |  |  |  | 22,100,000 | 10,800,000
Annual interest rate | 17.00% |  |  |  |  |  |  |  |  |  |
Payment made for milestone not achieved year one |  |  |  | 3,000,000 |  |  |  |  |  |  |
Potential payments milestone not achieved year two |  |  |  |  |  | 7,000,000 |  |  |  |  |
Royalty agreement contingent payment description |  |  |  |  | Because worldwide net sales of MIRCERAfor the 12 month period ended December 31, 2012 did not reach a required threshold. |  | If the specified worldwide net sales threshold of MIRCERAfor the 12 month period ended December 31, 2013 is not achieved. |  |  |  |
Contingent payment related to royalty obligation |  |  | 7,000,000 |  |  |  |  |  |  |  |
Other current liabilities | $ 14,123,000 | $ 9,414,000 |  |  |  |  |  |  | $ 7,000,000 |  |

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- Definition Increase in Non-Cash Royalty Revenue Based On Estimates Of Net Sales + References No definition available. + Details
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- Definition Payment Made For Milestone Not Achieved Year One + References No definition available. + Details
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- Definition Potential payments milestone not achieved year two. + References No definition available. + Details
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- Definition Proceeds from sale of potential future royalties gross. + References No definition available. + Details
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- Definition Royalty Revenue And Non-cash Royalty Revenue From Cimzia And Mircera + References No definition available. + Details
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