Balance Sheet Components - Product Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Product Warranties:
Balance, beginning of period	$ 7,777	$ 6,960	$ 7,700	$ 7,083
Provision for warranty	3,685	3,968	12,229	10,928
Costs charged to accrual	(3,872)	(3,706)	(10,545)	(10,476)
Change in estimated liability for pre-existing warranties	(460)	(13)	(2,254)	(326)
Balance, end of period	7,130	7,209	7,130	7,209
Current portion	(5,634)	(7,209)	(5,634)	(7,209)	$ (7,700)
Long-term portion	$ 1,496	$ 0	$ 1,496	$ 0