Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands				1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2021	Nov. 13, 2018	Jul. 27, 2018	Oct. 31, 2021	Sep. 30, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2020
Commitments And Contingencies [Line Items]
Non-current contingent consideration					$ 5,210	$ 385		$ 385
Cash contingent earn-out payments								807
Change in estimated fair value of contingent consideration						(2,218)	$ (221)	(4,658)	$ (918)
Rent expense under Operating Leases						$ 100	$ 100	$ 200	$ 300
Maximum
Commitments And Contingencies [Line Items]
Operating lease term						7 years		7 years
Quantum
Commitments And Contingencies [Line Items]
Non-current contingent consideration			$ 7,700
Contingent cash 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
Cash contingent earn-out payments				$ 800	1,400					$ 100
Contingent earn-out liability					800
Change in estimated fair value of contingent consideration								$ 700
Estimated fair value of earn-out liability						$ 200		200
Quantum | CBP
Commitments And Contingencies [Line Items]
Awarded contract amount						10,000		10,000
Optoseis Technology
Commitments And Contingencies [Line Items]
Non-current contingent consideration		$ 4,300
Contingent cash 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					$ 4,400
Change in estimated fair value of contingent consideration								4,000
Estimated fair value of earn-out liability						$ 400		$ 400
Aquana, LLC
Commitments And Contingencies [Line Items]
Contingent cash payments earn-out period	6 years