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Fair Value Measurements (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Payment for contingent consideration |  |  | $ 0 | $ 5,772 |  |  |  |
Goodwill | $ 341,645 |  | 341,645 |  |  | $ 225,522 |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Contingent consideration fair value | 6,200 |  | 6,200 | $ 8,000 | $ 6,200 | 6,200 | $ 10,000 | $ 4,228
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Contingent consideration fair value | 0 |  | 0 |  |  | 0 |  |
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Contingent consideration fair value | 0 |  | 0 |  |  | 0 |  |
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Contingent consideration fair value | 6,200 |  | 6,200 |  |  | 6,200 |  |
Opengear | Contingent Consideration |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Payment for contingent consideration | 10,000 |  |  |  |  |  |  |
Estimate of Fair Value Measurement | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Contingent consideration fair value | 6,200 |  | 6,200 |  |  | $ 6,200 |  |
Estimate of Fair Value Measurement | Haxiot | Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Payment for contingent consideration |  | $ 2,100 |  |  |  |  |  |
Contingent consideration fair value | $ 5,900 |  | $ 5,900 |  |  |  |  |

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