Defined Benefit Pension Obligation - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Loss (Details) - Defined benefit pension plan - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Net Periodic Benefit Costs:
Service cost	$ 1,903	$ 980	$ 734
Interest cost	76	107	60
Expected returns on assets	(102)	(92)	(61)
Amortization of net (gain) loss	53	3
Total	1,930	998	733
Other Amounts Recognized in Other Comprehensive Loss:
Net (gain) loss arising during the year	1,093	953	567
Prior service cost (credit)	(491)
Amortization of net (gain) loss	(53)	(3)
Total	549	$ 950	$ 567
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during fiscal year 2017
Net loss	2,350
Prior service (credit) cost	(445)
Accumulated other comprehensive loss	$ 1,905