Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended
	Nov. 13, 2018	Jul. 27, 2018	Dec. 31, 2020	Sep. 30, 2020
Commitments And Contingencies [Line Items]
Contingent earn-out liability			$ 7,955	$ 10,962
Adjustment to initial contingent earn-out liability			(697)
Future minimum lease obligations			$ 900
Maximum
Commitments And Contingencies [Line Items]
Operating lease term			7 years
Quantum
Commitments And Contingencies [Line Items]
Contingent earn-out liability		$ 7,700
Contingent payments earn-out period		4 years
Contingent payments earn-out period ending month and year		2022-07
Contingent payments maximum earn-out amount		$ 23,500
Contingent earn-out liability				5,800
Adjustment to initial contingent earn-out liability			$ 800
Estimated fair value of earn-out liability			5,000
Optoseis Technology
Commitments And Contingencies [Line Items]
Contingent earn-out liability	$ 4,300
Contingent payments earn-out period	5 years 6 months
Contingent payments earn-out period ending month and year	2024-05
Contingent payments maximum earn-out amount	$ 23,200
Contingent earn-out liability				$ 5,200
Adjustment to initial contingent earn-out liability			100
Estimated fair value of earn-out liability			$ 5,300