Summary of Significant Accounting Policies - Revenues by Geographic Area (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2016 USD ($) Segment	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of geographic segments | Segment									2
Revenues from unaffiliated customers
Total revenues	$ 53,033	$ 56,160	$ 51,995	$ 45,352	$ 45,301	$ 45,155	$ 48,247	$ 51,633	$ 206,540	$ 190,336	$ 213,968
Americas
Revenues from unaffiliated customers
Total revenues									158,291	138,118	141,227
Asia / Pacific
Revenues from unaffiliated customers
Total revenues									48,249	52,218	72,741
United States
Segment Reporting Information [Line Items]
Long-lived assets	4,200				6,500				4,200	6,500
Revenues from unaffiliated customers
Total revenues									152,830	132,831	136,758
Japan
Segment Reporting Information [Line Items]
Long-lived assets	$ 1,300				$ 1,500				1,300	1,500
Revenues from unaffiliated customers
Total revenues									$ 36,343	$ 41,428	$ 61,872