Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Sep. 27, 2017	Dec. 31, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
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	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		9,162,565
Entity Public Float			$ 8,469,044