Commitments and Contingencies - Additional Information (Details) - USD ($)			12 Months Ended
	Nov. 13, 2018	Jul. 27, 2018	Sep. 30, 2019	Sep. 30, 2018
Commitments And Contingencies [Line Items]
Contingent earn-out liability			$ 9,940,000	$ 7,713,000
Adjustment to initial contingent earn-out liability			(2,115,000)
Rent expense under Operating Leases			600,000	$ 100,000
Future minimum lease obligations, next twelve months			400,000
Future minimum lease obligations, due in two years			$ 36,000
Maximum
Commitments And Contingencies [Line Items]
Operating lease term			2 years
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
Adjustment to initial contingent earn-out liability			$ (2,900,000)
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
Adjustment to initial contingent earn-out liability			$ 800,000