Commitments and Contingencies - Additional Information (Details) - USD ($)				1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 02, 2021	Nov. 13, 2018	Jul. 27, 2018	Oct. 31, 2021	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2020
Commitments And Contingencies [Line Items]
Non-current contingent consideration					$ 5,210,000
Cash contingent consideration payments								$ 807,000
Change in estimated fair value of contingent consideration						$ (384,000)	$ (795,000)	(5,042,000)	$ (1,713,000)
Rent expense under Operating Leases						$ 100,000	$ 100,000	$ 400,000	$ 400,000
Maximum
Commitments And Contingencies [Line Items]
Operating lease term						7 years		7 years
Quantum
Commitments And Contingencies [Line Items]
Non-current contingent consideration			$ 7,700,000
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			$ 23,500,000
Cash contingent consideration payments				$ 800,000	1,400,000					$ 100,000
Contingent earn-out liability					800,000
Change in estimated fair value of contingent consideration								$ 600,000
Estimated fair value of earn-out liability						$ 200,000		200,000
Quantum | CBP
Commitments And Contingencies [Line Items]
Awarded contract amount						10,500,000		10,500,000
Optoseis Technology
Commitments And Contingencies [Line Items]
Non-current contingent consideration		$ 4,300,000
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		$ 23,200,000
Contingent earn-out liability					$ 4,400,000
Change in estimated fair value of contingent consideration								4,400,000
Fair value of contingent consideration liability						$ 0		$ 0
Aquana, LLC
Commitments And Contingencies [Line Items]
Contingent cash payments earn-out period	6 years