Income taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2017
Current income taxes:
Federal	$ 0	$ 0		$ (435)
State	14	32		(1,075)
Foreign	1,598	1,048		2,131
Total current income taxes	1,612	1,080		621
Deferred income taxes:
Federal	(76)	0		0
State	0	0		0
Foreign	(253)	(68)		220
Total deferred income taxes	(329)	(68)		220
Total provision for income taxes	$ 1,283	$ 1,012	[1]	$ 841	[1]

[1] See Note 1 for a summary of adjustments.