Defined Benefit Pension Obligation - Obligations and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Pension Obligation
Actuarial (gain) loss	$ (900)
Change in benefit obligation:
Actuarial (gain) loss	(900)
Defined benefit pension plan
Defined Benefit Pension Obligation
Actuarial (gain) loss	(846)	$ 1,163
Change in benefit obligation:
Benefit Obligation- Beginning of fiscal year	12,435	8,861
Service cost	1,996	1,903	$ 980
Interest cost	49	76	107
Plan participants' contributions	1,945	2,239
Plan amendment		(490)
Actuarial (gain) loss	(846)	1,163
Foreign currency changes	265	(347)
Benefit and expense payments	(1,865)	(970)
Benefit Obligation- End of fiscal year	13,979	12,435	8,861
Change in plan assets:
Plan assets - beginning of fiscal year	9,572	7,184
Employer contributions	1,283	1,226	1,200
Actual return on plan assets	137	176
Plan participants' contributions	1,945	2,239
Foreign currency changes	221	(283)
Benefit and expense payments	(1,865)	(970)
Plan assets - end of fiscal year	11,293	9,572	$ 7,184
Funded status	$ 2,686	$ 2,863