Revenue - Schedule of Remaining Performance Obligations related to Warranty (Details) - Long-term Warranty and Service $ in Thousands	Mar. 31, 2021 USD ($)
2021	$ 9,675
2022	31,617
2023	19,740
Thereafter	$ 14,420

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