XML 52 R37.htm IDEA: XBRL DOCUMENT v3.8.0.1
License Agreements (Details)
€ in Millions
1 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended 10 Months Ended 145 Months Ended
Oct. 31, 2017
USD ($)
Jul. 31, 2017
USD ($)
Apr. 30, 2017
USD ($)
Apr. 30, 2017
EUR (€)
Mar. 31, 2015
USD ($)
Sep. 30, 2005
USD ($)
Sep. 30, 2005
EUR (€)
Sep. 30, 2017
USD ($)
Dec. 31, 2006
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2017
EUR (€)
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2017
USD ($)
License Agreements                            
Milestone payments that triggered intangible asset recognition                   $ 8,712,000   $ 0    
Eisai | License Agreement                            
License Agreements                            
Period after the date of the first commercial sale of the product for license expiration         10 years                  
Initial license fee paid                 $ 500,000       $ 400,000  
Eisai | License Agreement | Maximum                            
License Agreements                            
Payments to be made upon achievement of certain clinical and regulatory milestones         $ 22,300,000.0                  
Collaborative Arrangement | Ipsen                            
License Agreements                            
Nonrefundable, non-creditable payment                           $ 13,000,000
Milestone payments that triggered intangible asset recognition     $ 8,700,000 € 8.0           8,700,000 € 8.0      
Royalty rate (as a percent)           5.00% 5.00%              
Collaborative Arrangement | Ipsen | Minimum                            
License Agreements                            
Period after the date of the first commercial sale of the product for license expiration           10 years 10 years              
Collaborative Arrangement | Ipsen | Maximum                            
License Agreements                            
Additional payments to be made upon achievement of certain development and commercialization milestones           $ 28,400,000 € 24.0              
Collaborative Arrangement | Teijin Agreement                            
License Agreements                            
Expiration period   10 years                        
Aggregate amount if regulatory and sales milestones are achieved   $ 40,000,000.0                        
Substantive milestones               $ 10,000,000   $ 10,000,000        
Subsequent event | Collaborative Arrangement | Teijin Agreement | Maximum                            
License Agreements                            
License agreement, upfront payment received $ 10,000,000