Summary of Significant Accounting Policies - Property, Plant, and Equipment (Details)	12 Months Ended
	Sep. 30, 2021
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	10 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	5 years
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	5 years
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	7 years