Stock Incentive Plan and Employee Stock Purchase Plan - Additional Information (Details)		12 Months Ended
		Jun. 30, 2024 USD ($) Plan $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Oct. 31, 2023 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock incentive plans | Plan		2
Employee stock purchase plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of compensation costs		10 months 24 days
Unrecognized compensation cost		$ 700,000
Purchase price expressed as percentage of fair market value of common stock		85.00%
Shares issued under the ESPP | shares		1,100,000	1,300,000	1,100,000
Weighted average fair value (in dollars per share) | $ / shares		$ 1.79	$ 1.75	$ 2.51
Common Stock, Capital Shares Reserved for Future Issuance | shares		3,800,000
Maximum | Employee stock purchase plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payroll deductions as percentage of salaries		10.00%
Number of shares per period up to which employees may purchase | shares		2,500
Value of shares up to which employees may purchase in any calendar year		$ 25,000
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total intrinsic value of options exercised				$ 300,000
Options granted (in dollars per share) | $ / shares		$ 0	$ 0
Cash received from option exercises		$ 300,000		1,200,000
Unrecognized compensation cost related to unvested stock options, net of estimated forfeitures		$ 600,000
Weighted average period for recognition of compensation costs		10 months 24 days
Weighted average grant date fair value	[1]	$ 0	$ 3,580,000
Grant date fair value of options granted				900,000
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of compensation costs		1 year 6 months
Unrecognized compensation cost		$ 11,300,000
Weighted average grant date fair value		9,700,000	7,200,000	12,000,000
Aggregate fair market value of units vested		$ 5,900,000	4,500,000	6,400,000
Vested (in shares) | shares		2,376,000
Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period for recognition of compensation costs		2 years
Unrecognized compensation cost		$ 2,600,000
Weighted average grant date fair value		3,300,000	$ 2,400,000	$ 3,700,000
Aggregate fair market value of units vested		$ 400,000
Vested (in shares) | shares		137,000	0	0
2007 Amended and Restated Plan | Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term		10 years
Percentage of the award vesting at first anniversary		25.00%
Vesting period for first 25% vesting rights				1 year
Remainder vesting period		36 months
2007 Amended and Restated Plan | Employee Stock Option | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise price of stock options as a percentage of fair market value on the grant date		100.00%
2007 Amended and Restated Plan | Time-based RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual vesting percentage		25.00%
2016 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of stock authorized | shares					5,000,000
Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance | shares		2,500,000

[1] The aggregate intrinsic value represents the total pre-tax intrinsic value, which is computed based on the difference between the exercise price and the closing price of Accuray common stock of $1.82 and $3.87 on June 28, 2024 and June 30, 2023, respectively, The amount represents what would have been received by the option holders had all option holders exercised their options and sold the shares received upon exercise as of that date.