Income taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Current income taxes
Federal	$ 70	$ (10,214)	$ (7,506)
State	5	(3,674)	(397)
Foreign	261	219	555
Total current income taxes	336	(13,669)	(7,348)
Deferred income taxes
Federal	0	1,334	3,205
State	0	0	128
Foreign	175	(671)	0
Total deferred income taxes	175	663	3,333
Provision (benefit) for income taxes from continuing operations	$ 511	$ (13,006)	$ (4,015)