Summary of Operations and Significant Accounting Policies - Property, Plant and Equipment - Additional Information (Details)	12 Months Ended
	Sep. 30, 2019
Minimum | Equipment, Machinery and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	3 years
Minimum | Furniture and fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	5 years
Minimum | Building
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	20 years
Maximum | Equipment, Machinery and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	7 years
Maximum | Furniture and fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	10 years
Maximum | Building
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life (in years)	30 years