Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	9 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Goodwill And Other Intangible Assets [Line Items]
Impairment of goodwill and long-lived assets	$ 0
Carrying amount of indefinite trade names acquired	14,000,000
CoAdna Holdings, Inc.
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions		$ 16,072,000
Redstone Aerospace Corporation
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 9,100,000
Technology and Patents
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months	86 months
Technology and Patents | Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	60 months
Technology and Patents | Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	240 months
Technology and Patents | CoAdna Holdings, Inc.
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 9,800,000
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months	131 months
Customer Lists | Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	120 months
Customer Lists | Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	240 months
Customer Lists | CoAdna Holdings, Inc.
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 6,300,000
Technology-Based Intangible Assets | WSS Product Line
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	6,300,000
Technology-Based Intangible Assets | Redstone Aerospace Corporation
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 9,100,000