Income Taxes (Narratives) (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Operating Loss Carryforwards [Line Items]
Income tax provision (benefit)	$ 1,320,000		$ 1,595,000
Remaining state net operating loss	0		$ 0
Additions resulting from the acquisition of Aerohive		$ 75,000,000
Unrecognized tax benefits	23,800,000
Unrecognized tax benefits that would affect the effective tax rate if recognized	500,000
Unrecognized tax benefit future impact if recognized	$ 23,300,000
Aerohive Networks, Inc.
Operating Loss Carryforwards [Line Items]
Amortization period of intangible assets and goodwill resulting from acquisition		10 years