Joint Venture - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Equity Method Investments [Line Items]
Increase to accumulated deficit		$ (502,136,000)	$ (492,522,000)
Currency translation adjustment		(159,000)	(120,000)
Equity method goodwill		57,681,000	57,840,000	$ 57,960,000
Impairment of goodwill	$ 0	$ 0	0	0
Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture		49.00%
Deferred of intra-entity profit margin		$ 5,737,000	5,456,000
Previously deferred intra-entity profit margin from sales - recognized		(10,436,000)	(4,007,000)	$ (2,403,000)
Carrying value of investment in joint venture		15,128,000	13,879,000
Proportional share of equity investment in joint venture		16,145,000	14,615,000
Currency translation adjustment			1,000,000
Equity method goodwill		$ (4,720,000)	(4,720,000)
Accuray Asia
Schedule Of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture		49.00%
Impairment of goodwill		$ 0	$ 0