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Collaboration Agreements (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Collaborative arrangements [Line Items] | |||
| Contracts and grants revenue | $ 54,823,000 | $ 66,009,000 | $ 70,975,000 |
|
Abbott Laboratories TRU016 [Member]
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| Collaborative arrangements [Line Items] | |||
| Contracts and grants revenue | 2,700,000 | 17,700,000 | |
| Recognition of deferred revenue | 1,400,000 | 10,500,000 | |
| Revenue related to achievement of a development milestone | 6,000,000 | ||
| Revenues related to collaborative research funding | 1,400,000 | 1,200,000 | |
|
Pfizer CD20 [Member]
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| Collaborative arrangements [Line Items] | |||
| Contracts and grants revenue | 1,200,000 | 1,900,000 | |
| Recognition of deferred revenue | 68,000 | 52,000 | |
| Revenues related to collaborative research funding | $ 1,100,000 | $ 1,800,000 | |