Revenue - Schedule of Remaining Performance Obligations related to Warranty (Details) - Long-term warranty and service $ in Thousands	Sep. 30, 2019 USD ($)
2020	$ 28,619
2021	26,649
2022	14,714
Thereafter	$ 12,332

Amount of transaction price allocated to performance obligation that has not been recognized as revenue in year three and thereafter.

No definition available.

Name:	aray_RevenueRemainingPerformanceObligationInYearThreeAndThereafter
Namespace Prefix:	aray_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant