Stockholders' equity - Summary of RSU Activity (Details) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2019 USD ($) shares
Number of Shares
SUs outstanding (in shares)	2,637
RSUs
Number of Shares
SUs outstanding (in shares)	3,068
Granted (in shares)	1,195
Vested (in shares)	(1,151)
Canceled (in shares)	(475)
SUs outstanding (in shares)	2,637
RSUs expected to vest (in shares)	2,276
Weighted average remaining contractual life (years)
RSUs outstanding - Weighted average remaining contractual life	1 year 3 months 18 days
RSUs expected to vest - Weighted average remaining contractual life	1 year 2 months 4 days
Aggregate intrinsic value
RSUs outstanding - Aggregate intrinsic value | $	$ 21,097
RSUs expected to vest - Aggregate intrinsic value | $	$ 18,205