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Fair Value Measurements (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 05, 2015 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 13, 2019 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  |  |  | $ (128) | $ 1,188 |  |  |  |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  | $ 4,228 | $ 5,405 | 4,228 | $ 5,405 | $ 10,379 |  | $ 5,407 | $ 8,527 | $ 10,065
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 |  | 4,228 |  | $ 4,228 |  |  |  | 5,407 |  |
Bluenica Corporation |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Earn-out payment installment period | 4 years |  |  |  |  |  |  |  |  |
Bluenica Corporation | Contingent Consideration |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  | 2,900 |  |  |  |  |  |  |  |
Accelerated | Contingent Consideration |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  | 2,400 | $ 3,500 |  |  |  |  |  |  |
Opengear | Maximum | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value inputs probability of payment |  |  |  | 49.00% |  |  |  |  |  |
Opengear | Contingent Consideration |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  | 900 |  |  |  |  |  |  |  |
Estimate of Fair Value Measurement | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  | 4,228 |  | $ 4,228 |  |  |  | $ 5,407 |  |
Estimate of Fair Value Measurement | Opengear | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  |  | $ 5,100 |  |  |
Estimate of Fair Value Measurement | Earn-Out Payments | Opengear | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  | $ 4,200 |  | $ 4,200 |  |  |  |  |  |

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