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Commitments and Contingencies (Details Textual)	3 Months Ended
	Mar. 31, 2019 USD ($)
Other Commitment	$ 5,632,837
JJV LLC [Member] | Minimum [Member]
Loan Origination Fees On Original Loan Principal, Percentage	2.00%
JJV LLC [Member] | Maximum [Member]
Loan Origination Fees On Original Loan Principal, Percentage	5.00%

X

- Definition

It represents the percentage rate of loan origination fees on original loan principal.

+ References

No definition available.

+ Details

Name:	sach_LoanOriginationFeesOnOriginalLoanPrincipalpercentage
Namespace Prefix:	sach_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=sach_JjvLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: