Derivative Financial Instruments - Additional Information (Details) - contract	Sep. 30, 2018	Jun. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Outstanding foreign currency contracts (number of contracts)	0	0

The number of outstanding foreign currency forward contracts.

No definition available.

Name:	aray_ForeignCurrencyForwardContracts
Namespace Prefix:	aray_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant