Business And Organization [Line Items]

No definition available.

Name:	ssy_BusinessAndOrganizationLineItems
Namespace Prefix:	ssy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of bed in nursing home owned and operated by subsidiary.

+ References

No definition available.

+ Details

Name:	ssy_NumberOfBedInNursingHomeOwnedAndOperatedBySubsidiary
Namespace Prefix:	ssy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of licensed-bed owned and operated by subsidiary.

+ References

No definition available.

+ Details

Name:	ssy_NumberOfLicensedBedOwnedAndOperatedBySubsidiary
Namespace Prefix:	ssy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of service lines.

+ References

No definition available.

+ Details

Name:	ssy_NumberOfServiceLines
Namespace Prefix:	ssy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Undeveloped Land Held For Sale

+ References

No definition available.

+ Details

Name:	ssy_UndevelopedLandHeldForSale
Namespace Prefix:	ssy_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until its disposal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

Name:	us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ssy_MedicalOfficeBuildingAndUndevelopedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ssy_HealthcareServicesSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ssy_CommunityHospitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ssy_NursingHomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_MS
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_GA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ssy_PharmacySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_LA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Business Operations - Additional Information (Detail) $ in Thousands		3 Months Ended
	Oct. 11, 2018 USD ($) a	Dec. 31, 2018 USD ($)	Sep. 30, 2018 Segment Bed Services
Business And Organization [Line Items]
Number of segments \| Segment			2
Medical Office Building And Undeveloped Land [Member] \| Scenario, Forecast [Member]
Business And Organization [Line Items]
Earnings (Loss) before income taxes \| $		$ 452
Medical Office Building And Undeveloped Land [Member] \| Subsequent Event [Member]
Business And Organization [Line Items]
Proceeds from sale \| $	$ 935
Undeveloped land sold \| a	2
Healthcare Services Segment [Member] \| Community Hospital [Member]
Business And Organization [Line Items]
Number of licensed-bed owned and operated by a subsidiary			84
Healthcare Services Segment [Member] \| Nursing Home [Member] \| Mississippi [Member]
Business And Organization [Line Items]
Number of bed in nursing home owned and operated by subsidiary			66
Healthcare Services Segment [Member] \| Nursing Home [Member] \| Georgia [Member]
Business And Organization [Line Items]
Number of bed in nursing home owned and operated by subsidiary			100
Pharmacy Segment [Member] \| Louisiana [Member]
Business And Organization [Line Items]
Number of material service lines \| Services			4