Document and Entity Information - shares	6 Months Ended
	Dec. 31, 2021	Jan. 20, 2022
Cover [Abstract]
Entity Registrant Name	ACCURAY INCORPORATED
Entity Central Index Key	0001138723
Document Type	10-Q
Document Period End Date	Dec. 31, 2021
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Entity Current Reporting Status	Yes
Trading Symbol	ARAY
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		92,733,531
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity File Number	001-33301
Entity Tax Identification Number	20-8370041
Entity Address, Address Line One	1310 Chesapeake Terrace
Entity Address, City or Town	Sunnyvale
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94089
City Area Code	408
Local Phone Number	716-4600
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Common Stock, $0.001 par value per share
Security Exchange Name	NASDAQ