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