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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 |  |  |  |  |  |  |  |  |

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