Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Payment for contingent consideration	$ 0		$ 5,772
Goodwill	342,498			$ 225,522
Fair Value, Inputs, Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration fair value	6,200		$ 10,000	6,200	$ 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
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
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
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
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