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Fair Value Measurements (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2020 | Sep. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jul. 06, 2021 | Mar. 26, 2021 | Jan. 22, 2018 | Oct. 05, 2015
Estimate of Fair Value Measurement | Contingent consideration on acquired business | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  | $ 6,200 |  |  |  |  |  |  |  |  |
Estimate of Fair Value Measurement | Bluenica Corporation | Contingent consideration on acquired business | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,400
Estimate of Fair Value Measurement | Accelerated Concepts | Contingent consideration on acquired business | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,300 |
Change in fair value of contingent consideration |  |  |  |  | $ (6,200) | 5,772 | $ (128) |  |  |  |  |  |  |  |
Goodwill |  | $ 340,477 |  |  | 340,477 | 225,522 | 210,135 |  |  |  |  |  |  |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  | 0 |  |  | 0 | 6,200 | 4,228 |  |  |  |  |  |  |  |
Contingent consideration on acquired business | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  | 6,200 |  |  |  |  |  |  |  |  |
Bluenica Corporation | Contingent consideration on acquired business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration |  |  |  |  |  | $ 2,900 | 2,200 |  | $ 0 |  | $ 500 |  |  |  |
TempAlert | Contingent consideration on acquired business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  |  |  |  |
Accelerated Concepts | Contingent consideration on acquired business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent consideration | $ 2,400 |  |  |  |  |  | $ 3,500 |  |  |  |  |  |  |  |
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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