Mortgages Receivable (Details 1) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
2018	$ 36,334,463
2019	12,555,659
2020	11,985,837
2021	2,395,000
Total	$ 63,270,959	$ 33,750,610

Maturities for the fourth year following the date of the financial statements.

No definition available.

Name:	sach_MaturitiesOfMortagageReceivableYearFour
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maturities for the first year following the date of the financial statements.

+ References

No definition available.

+ Details

Name:	sach_MaturitiesOfMortagageReceivableYearOne
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maturities for the third year following the date of the financial statements.

+ References

No definition available.

+ Details

Name:	sach_MaturitiesOfMortagageReceivableYearThree
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maturities for the second year following the date of the financial statements.

+ References

No definition available.

+ Details

Name:	sach_MaturitiesOfMortagageReceivableYearTwo
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29)
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant