Commitments and Contingencies - Additional Information (Details) - USD ($)	Nov. 13, 2018	Jul. 27, 2018	Jun. 30, 2019	Sep. 30, 2018
Commitments And Contingencies [Line Items]
Contingent earn-out liability			$ 12,055,000	$ 7,713,000
Quantum
Commitments And Contingencies [Line Items]
Contingent earn-out liability		$ 7,700,000
Contingent payments earn-out period		4 years
Contingent payments maximum earn-out amount		$ 23,500,000
Optoseis Technology
Commitments And Contingencies [Line Items]
Contingent earn-out liability	$ 4,300,000
Contingent payments earn-out period	5 years 6 months
Contingent payments maximum earn-out amount	$ 23,200,000