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Mortgage Funding Payable (Details Textual)	3 Months Ended
	Mar. 31, 2018 USD ($)
Proceeds from Mortgage Funding Payable	$ 2,000,000

X

- Definition

The cash inflow from a mortgage funding during the year.

+ References

No definition available.

+ Details

Name:	sach_ProceedsFromMortgageFundingPayable
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration