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Major Customers, Partnerships and Strategic Alliances (Tables) | 12 Months Ended
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Dec. 31, 2018
Bioverativ Inc [Member] |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |
Revenues Recognized under Agreement | Revenues recognized under the Bioverativ Agreement for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Revenue related to Bioverativ agreement: |  |  |  |  |  |  |  |  |  |  |  |
Recognition of upfront fee |  | $ | 4,013 |  |  | $ | 1,769 |  |  | $ | 2,321 |
Research services |  |  | 9,503 |  |  |  | 10,489 |  |  |  | 6,565 |
Total |  | $ | 13,516 |  |  | $ | 12,258 |  |  | $ | 8,886 |

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- Definition Tabular disclosure of contractual arrangements that involve two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity. Additionally, the element may include all other transactions of the entity categorized collectively, if such comparison of collaborative arrangements as a component of all transactions of the entity is desired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 808 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434 + Details
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