Summary of Significant Accounting Policies - Revenue by Geographic Regions and Significant Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information
Total revenues	$ 49,127	$ 54,894
Americas
Segment Reporting Information
Total revenues	36,163	40,135
Asia/Pacific & Europe
Segment Reporting Information
Total revenues	12,964	14,759
United States
Segment Reporting Information
Total revenues	34,115	38,618
Japan
Segment Reporting Information
Total revenues	$ 10,856	$ 10,607