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Sales Tax Payable - Additional Information (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2023 USD ($)
Payables and Accruals [Abstract]
Sales Tax Receivable	$ 321

X

- Definition

Sales Tax Receivable

+ References

No definition available.

+ Details

Name:	ssy_SalesTaxReceivable
Namespace Prefix:	ssy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration