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Fair Value Measurements (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Jul. 06, 2021 | Mar. 26, 2021
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration |  |  |  |  | $ 0 | $ (6,200) | $ 5,772 |  |
Goodwill | $ 341,593 | $ 340,477 |  |  | 341,593 | 340,477 | 225,522 |  |
Total liabilities measured at fair value | 0 | 0 |  |  | 0 | 0 |  |  |
Total assets measured at fair value | 0 | 0 |  |  | 0 | 0 |  |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |
Contingent consideration fair value | 0 | 0 |  |  | 0 | $ 0 | $ 6,200 |  |
Opengear | Contingent consideration on acquired business |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration |  |  | $ 900 | $ 10,000 |  |  |  |  |
Haxiot |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration | (5,900) |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 8,605
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability | 0 |  |  |  | 0 |  |  |  | $ 5,900
Ctek |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration |  | $ (300) |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 4,867 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability | $ 0 |  |  |  | $ 0 |  |  | $ 300 |

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