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Related Party Transactions (Details) - Memorial Sloan Kettering Cancer Center [Member]
6 Months Ended
Jun. 30, 2015
USD ($)
New Drug Application [Member]  
Summary of milestone payments related to related party  
Milestones payments $ 750,000
Receipt of Regulatory Approval From U.S. FDA [Member]  
Summary of milestone payments related to related party  
Milestones payments $ 1,750,000