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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 |  |  |

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