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Commitments and Contingencies (Details) - AbbVie Biotherapeutics Corp [Member] - USD ($) | 1 Months Ended | 6 Months Ended
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Jul. 24, 2012 | Jun. 30, 2017
Summary of milestone payment |  |
Milestones Payments |  | $ 7,750,000
Phase 1 Clinical Trial of a licensed product [Member] |  |
Summary of milestone payment |  |
Milestones Payments | $ 750,000 | $ 750,000
Milestones Date Met |  | July 2012
Phase 2 Clinical Trial of a licensed product [Member] |  |
Summary of milestone payment |  |
Milestones Payments |  | $ 750,000
Milestones Date Met |  | September 2016
Phase 3 Clinical Trial of a licensed product [Member] |  |
Summary of milestone payment |  |
Milestones Payments |  | $ 1,500,000
Milestones Date Met |  | In future
Biological License Application filing with U.S. FDA [Member] |  |
Summary of milestone payment |  |
Milestones Payments |  | $ 1,750,000
Milestones Date Met |  | In future
First commercial sale [Member] |  |
Summary of milestone payment |  |
Milestones Payments |  | $ 1,500,000
Milestones Date Met |  | In future
After first net sales [Member] |  |
Summary of milestone payment |  |
Milestones Payments |  | $ 1,500,000
Milestones Date Met |  | In future

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