Income Taxes - Valuation allowance for deferred tax assets (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Deferred Tax Assets Valuation Allowance [Roll Forward]
Balance at beginning of period	$ 26,622	$ 32,892	$ 27,753
Provision for income taxes	(19,709)	(6,270)	5,139
Net operating loss utilization	(2,299)
Balance at end of period	$ 4,614	$ 26,622	$ 32,892