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Financing Agreement with Novo A/S (Details)
$ in Thousands
1 Months Ended 6 Months Ended 26 Months Ended
Nov. 30, 2014
USD ($)
Jan. 31, 2014
USD ($)
May. 31, 2013
USD ($)
tranche
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Agreement            
Royalty rights purchase price         $ 125,000 $ 125,000
Proceeds from royalty purchase agreement       $ 41,667    
Novo A/S | Novo Agreement | Fovista, Fovista-Related Products, and Other Products            
Agreement            
Number of tranches in financing | tranche     3      
Aggregate royalty rights     $ 125,000      
Royalty rights purchase price     41,700      
Proceeds from royalty purchase agreement $ 41,700 $ 41,700 $ 41,700   $ 125,000