Stock Incentive Plan and Employee Stock Purchase Plan - Summary of Share-based Compensation Charges Included in the Company's Consolidated Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Share-based compensation expenses
Share-based compensation expense	$ 12,289	$ 13,629	$ 12,638
Cost of revenue
Share-based compensation expenses
Share-based compensation expense	1,866	1,991	1,677
Research and development
Share-based compensation expenses
Share-based compensation expense	2,312	2,490	2,564
Selling and marketing
Share-based compensation expenses
Share-based compensation expense	1,390	2,827	2,633
General and administrative
Share-based compensation expenses
Share-based compensation expense	$ 6,721	$ 6,321	$ 5,764