Revenue - Schedule of Remaining Performance Obligations related to Warranty (Details) - Long-term warranty and service $ in Thousands	Dec. 31, 2019 USD ($)
2020	$ 17,914
2021	31,645
2022	19,200
Thereafter	$ 15,136

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