Annual report pursuant to Section 13 and 15(d)

Contingent Liabilities (Narrative) (Details)

v3.10.0.1
Contingent Liabilities (Narrative) (Details)
 12 Months Ended
Sep. 30, 2018
USD ($)
lawsuit
May 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Other Commitments [Line Items]      
Loss contingency, range of possible loss, maximum $ 10,000,000    
Number of class action lawsuits filed | lawsuit 2    
Possible losses accrued $ 0    
Total obligated upfront payments made 950,000    
Intellectual Property Rights [Member]      
Other Commitments [Line Items]      
Total obligated upfront payments made 250,000 $ 250,000 $ 500,000
Additional Payments on Intellectual Property Rights [Member]      
Other Commitments [Line Items]      
Total obligated upfront payments made $ 700,000