Balance Sheet Components - Product Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Product Warranties:
Balance, beginning of period	$ 6,925	$ 7,777	$ 7,129	$ 7,700
Provision for warranty	5,332	3,685	15,030	12,229
Costs charged to accrual	(5,362)	(3,872)	(14,919)	(10,545)
Change in estimated liability for pre-existing warranties	214	(460)	(131)	(2,254)
Balance, end of period	7,109	7,130	7,109	7,130
Current portion	(5,805)	(5,634)	(5,805)	(5,634)	$ (5,816)
Long-term portion	$ 1,304	$ 1,496	$ 1,304	$ 1,496	$ 1,313