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Collaboration Agreement (Details) - USD ($)
1 Months Ended 3 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2016
Sep. 30, 2017
Sep. 30, 2016
Guarantor Obligations [Line Items]          
Upfront cash payment and other payments received under collaboration agreement       $ 6,000,000  
License fee and other revenues   $ 300,000 $ 300,000 $ 1,095 $ 15,107
Scenario Plan          
Guarantor Obligations [Line Items]          
License fee and other revenues $ 300,000        
The Bayer Group (formerly Algeta ASA) [Member]          
Guarantor Obligations [Line Items]          
Period of time for prior written notice to exercise right to terminate agreement       3 months