Summary of Significant Accounting Policies (Estimated Useful Life) (Details)	12 Months Ended
	Sep. 30, 2018
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	6 years