Business Acquisition - Additional Information (Details) - USD ($)		3 Months Ended
	Nov. 13, 2018	Dec. 31, 2018	Sep. 30, 2018
Business Acquisition [Line Items]
Acquisition purchase price		$ 1,819,000
Contingent earn-out liability		$ 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 and other intangible assets	$ 6,100,000
Contingent earn-out liability	4,300,000
Current assets acquired	0
Current liabilities acquired	0
Acquisition related legal costs	$ 200,000