Business Acquisitions - Additional Information (Details) - USD ($)			12 Months Ended
	Nov. 13, 2018	Jul. 27, 2018	Sep. 30, 2019	Nov. 30, 2018	Sep. 30, 2018	Jul. 31, 2018
Business Acquisition [Line Items]
Contingent earn-out liability			$ 9,940,000		$ 7,713,000
Goodwill (not deductible for tax purposes)			5,008,000		$ 4,343,000
Optoseis Technology
Business Acquisition [Line Items]
Business acquisition date	Nov. 13, 2018
Acquisition purchase price	$ 1,800,000
Contingent payments maximum earn-out amount	$ 23,200,000
Contingent payments earn-out period	5 years 6 months
Goodwill	$ 700,000
Other intangible assets	3,700,000
Fixed assets	1,700,000
Contingent earn-out liability	4,300,000
Acquisition related costs	$ 200,000
Goodwill, period increase (decrease)			1,000,000
Increase decrease in other intangible assets			800,000
Goodwill (not deductible for tax purposes)				$ 700,000
Optoseis Technology | Machinery and Equipment
Business Acquisition [Line Items]
Property plant and equipment, Additions			$ 1,800,000
Quantum
Business Acquisition [Line Items]
Business acquisition date		Jul. 27, 2018
Acquisition purchase price		$ 4,400,000
Contingent payments maximum earn-out amount		$ 23,500,000
Contingent payments earn-out period		4 years
Other intangible assets		$ 8,200,000
Contingent earn-out liability		7,700,000
Acquisition related costs		300,000
Goodwill (not deductible for tax purposes)		4,300,000				$ 4,300,000
Current assets acquired		200,000
Current liabilities acquired		$ 600,000