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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The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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	1 Months Ended	3 Months Ended			12 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	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