Balance Sheet Components (Allowance for Product Returns) (Details) - Allowance for Product Returns [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 11,266	$ 7,296	$ 3,123
Additions	85,190	38,103	31,034
Deductions	(70,559)	(34,133)	(26,861)
Balance at end of period	$ 25,897	$ 11,266	$ 7,296