Stock Incentive Plan and Employee Stock Purchase Plan - Share-Based Compensation Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based compensation charges
Share-based compensation expense	$ 13,629	$ 12,638	$ 13,930
Cost of revenue
Share-based compensation charges
Share-based compensation expense	1,991	1,677	1,874
Research and development
Share-based compensation charges
Share-based compensation expense	2,490	2,564	2,971
Selling and marketing
Share-based compensation charges
Share-based compensation expense	2,827	2,633	2,945
General and administrative
Share-based compensation charges
Share-based compensation expense	$ 6,321	$ 5,764	$ 6,140