| Document and Entity Information | Oct. 21, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | ACCURAY INCORPORATED |
| Amendment Flag | false |
| Entity Central Index Key | 0001138723 |
| Document Type | 8-K |
| Document Period End Date | Oct. 21, 2024 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-33301 |
| 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 | 53717-1954 |
| City Area Code | 608 |
| Local Phone Number | 824-2800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.001 per share |
| Trading Symbol | ARAY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
