Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Mortgages Receivable (Details Textual)

v3.8.0.1

Mortgages Receivable (Details Textual) - USD ($)	3 Months Ended
Mortgages Receivable (Details Textual) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Nov. 30, 2016
Mortgage Loans on Real Estate, Default Interest Rate	18.00%
Payments to Acquire Mortgage Receivable	$ 10,345,784	$ 10,091,528
Receivable with Imputed Interest, Discount				$ 74,954
Proceeds from Collection of Mortgages Receivable	6,034,243	3,938,601
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	69,582,500		$ 63,270,959
Amortization Of Stock Option Discount	1,630	1,630
Mortgages [Member]
Payments to Acquire Mortgage Receivable	10,345,784	$ 10,091,528
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	3,500,000
Minimum [Member]
Mortgage Loans on Real Estate, Face Amount of Mortgages	$ 15,000
Mortgage Loans on Real Estate, Interest Rate	9.50%
Maximum [Member]
Mortgage Loans on Real Estate, Face Amount of Mortgages	$ 2,000,000
Mortgage Loans on Real Estate, Interest Rate	12.00%
JJV LLC [Member]
Exercise of Option To Share, Percentage on Discount		75.00%
Receivable with Imputed Interest, Discount		$ 55,390

- Definition

The amount of stock options expenses amortized.

+ References

No definition available.

+ Details

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

- Definition

It represents the percentage rate of option which exercises into share on discount.

+ References

No definition available.

+ Details

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

- Definition

The default interest rate on the mortgage loan receivable.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow to acquire a mortgage receivable for a definite sum of money at a future date.

+ References

No definition available.

+ Details

Name:	sach_PaymentsToAcquireMortgageReceivable
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with principal collections from a mortgages receivable.

+ References

No definition available.

+ Details

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

- 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

- Definition

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

+ References

Reference 1: 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

Reference 2: 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

+ Details

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

- Definition

The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Disclosure of the unamortized amount of the discount on the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sach_JjvLlcMember
Namespace Prefix:
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Period Type: