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Collaboration Arrangements - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 29 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Mar. 31, 2014
Merck KGaA
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Jun. 30, 2014
Merck KGaA
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Jun. 30, 2014
Merck KGaA
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Jun. 30, 2014
Merck KGaA
United States
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Jun. 30, 2014
Merck KGaA
Regulatory and Development Milestones
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Jun. 30, 2014
Merck KGaA
Commercialization Milestones
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| Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] | ||||||||||
| Upfront and milestone payments received to date | $ 12.5 | $ 110.0 | ||||||||
| Potential future milestones | 100 | 340 | ||||||||
| Merck KGaA's percentage share of worldwide development expenses | 70.00% | |||||||||
| Portion of profits that Company is eligible to participate, depending upon total sales | 50.00% | |||||||||
| Revenue recognized by the Company | 3.7 | 3.2 | 7.4 | 6.1 | ||||||
| Company earned a reimbursement for eligible worldwide development expenses | $ 3.5 | $ 2.5 | $ 9.4 | $ 6.1 | ||||||