Industry segment and geographic information - Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 220,896	$ 218,463		$ 209,715
Property and equipment	5,655	6,987	[1]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	179,723	195,795		188,735
Property and equipment	2,751	3,213
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	41,173	22,668		$ 20,980
Property and equipment	$ 2,904	$ 3,774

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