Income Taxes (Narratives) (Details) - USD ($)	3 Months Ended			9 Months Ended
	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Operating Loss Carryforwards [Line Items]
Income tax provision (benefit)	$ 2,436,000		$ 1,557,000	$ 5,579,000	$ 4,949,000
Remaining state net operating loss	0		$ 0	0	$ 0
Additions resulting from the acquisition of Aerohive		$ 75,000,000.0
Unrecognized tax benefits	23,600,000			23,600,000
Unrecognized tax benefits that would affect the effective tax rate if recognized	500,000			500,000
Unrecognized tax benefit future impact if recognized	$ 23,100,000			$ 23,100,000
Aerohive Networks, Inc.
Operating Loss Carryforwards [Line Items]
Amortization period of intangible assets and goodwill resulting from acquisition		10 years