Business Acquisition - Additional Information (Details) - USD ($)		3 Months Ended	6 Months Ended
	Nov. 13, 2018	Mar. 31, 2019	Mar. 31, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Acquisition purchase price			$ 1,819,000
Contingent earn-out liability		$ 12,055,000	$ 12,055,000	$ 7,713,000
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
Legal costs	$ 200,000
Goodwill, period increase (decrease)		900,000
Increase decrease in other intangible assets		800,000
Optoseis Technology | Machinery and Equipment
Business Acquisition [Line Items]
Property plant and equipment, Additions		$ 1,700,000