v3.26.1
Document And Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2026
Aug. 21, 2026
Dec. 31, 2025
Document Information [Line Items]      
Entity Central Index Key 0001138723    
Entity Registrant Name ACCURAY INCORPORATED    
Amendment Flag false    
Current Fiscal Year End Date --06-30    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2026    
Document Transition Report false    
Entity File Number 001-33301    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-8370041    
Entity Address, Address Line One 1240 Deming Way    
Entity Address, City or Town Madison    
Entity Address, State or Province WI    
Entity Address, Postal Zip Code 53717    
City Area Code 608    
Local Phone Number 824-2800    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol ARAY    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 86,940,088
Entity Common Stock, Shares Outstanding   119,439,307  
Auditor Firm ID 248    
Auditor Name GRANT THORNTON LLP    
Auditor Location San Jose, California