| Document and Entity Information | Jan. 23, 2024 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 23, 2024 |
| Entity Registrant Name | SunLink Health Systems Inc. |
| Entity Incorporation, State or Country Code | GA |
| Entity File Number | 001-12607 |
| Entity Tax Identification Number | 31-0621189 |
| Entity Address, Address Line One | 900 Circle 75 Parkway |
| Entity Address, Address Line Two | Suite 690 |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30339 |
| City Area Code | 770 |
| Local Phone Number | 933-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000096793 |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Title of 12(b) Security | Common Shares without par value |
| Trading Symbol | SYY |
| Security Exchange Name | NYSEAMER |
| Right [Member] | |
| Document And Entity Information [Line Items] | |
| Title of 12(b) Security | Preferred Share Purchase Rights |
| Security Exchange Name | NONE |
| No Trading Symbol Flag | true |
