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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 |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e7008-128479 + Details
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