Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2019	Sep. 26, 2019	Dec. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	SSY
Entity Registrant Name	SUNLINK HEALTH SYSTEMS INC
Entity Central Index Key	0000096793
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		6,986,855
Entity Public Float			$ 4,884,050
Entity File Number	1-12607
Entity Tax Identification Number	310621189
Entity Address, Address Line One	900 Circle 75 Parkway
Entity Address, Address Line Two	Suite 1120
Entity Address, City or Town	Atlanta
Entity Address, State or Province	Georgia
Entity Address, Postal Zip Code	30339
City Area Code	770
Local Phone Number	933-7000