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License Agreements - Rutger Agreement (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Jun. 30, 2016
USD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
License agreements      
Research and development   $ 10,740 $ 2,370
Rutgers Agreement | Collaborative arrangement      
License agreements      
License Costs $ 75    
Number of years the Company is required to pay Rutgers annual license maintenance fees 5 years    
Annual license maintenance fees after execution of the agreement $ 25    
Change of control fee 0.3    
Consideration payable upon change-of-control event $ 100    
Fair value of derivative liability $ 0 0  
Last patent right expiration period 10 years    
Research and development   $ 0  
Rutgers Agreement | Collaborative arrangement | Maximum      
License agreements      
Milestone payment to be paid $ 825    
Extension of due diligence requirements 1 year    
Amount of payment subject to due diligence extension $ 500    
Rutgers Agreement | Collaborative arrangement | Minimum      
License agreements      
Guaranteed royalties $ 100