Acquisitions Details (Details) - Opengear	3 Months Ended
	Dec. 31, 2020
Other non-current assets
Business Acquisition [Line Items]
Immaterial out-of-period adjustment	0.8 million
Other current liabilities
Business Acquisition [Line Items]
Immaterial out-of-period adjustment	1.1 million
Other non-current liabilities
Business Acquisition [Line Items]
Immaterial out-of-period adjustment	0.3 million