Deferred revenue and remaining performance obligations - Contract with customer, liability (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2019 |
|
| Contract with Customer, Liability [Roll Forward] | ||
| Beginning balance, June 30, 2019 | $ 135,135 | |
| Revenue recognized that was included in beginning balance | (32,434) | |
| Amount billed, net of revenue recognized that was not included in beginning balance | 41,470 | |
| Ending balance, December 31, 2019 | $ 144,171 | 144,171 |
| Cumulative adjustment as a result of changes in the estimate of the transaction price | 138 | 318 |
| Revenue recognized from performance obligations satisfied or partially satisfied in previous periods | $ 239 | $ 354 |