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

Subsequent Events - compensation packages (Details)

v3.21.1

Subsequent Events - compensation packages (Details)					3 Months Ended		12 Months Ended
Subsequent Events - compensation packages (Details)	Oct. 01, 2021 USD ($)	Jul. 01, 2021 USD ($)	Apr. 12, 2021 $ / shares shares	Apr. 08, 2021 $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2021 STD (Db)
Subsequent Event [Line Items]
Targeted annual bonus					$ 250,000
Time-Based Equity Award Payable In Restricted Common Shares \| Db								Db 500,000
John L. Villano
Subsequent Event [Line Items]
Base salary					500,000	$ 360,000
Cash bonus					250,000
Cash bonus immediately payable					125,000
Peter J. Cuozzo
Subsequent Event [Line Items]
Base salary					250,000		$ 250,000
Time-Based Equity Award Payable In Restricted Common Shares					25,000
Cash bonus immediately payable					$ 25,000
Subsequent Events [Member]
Subsequent Event [Line Items]
Restricted Common Shares issued \| shares			4,753	89,928
Closing price per share \| $ / shares			$ 5.26	$ 5.56
Subsequent Events [Member] \| John L. Villano
Subsequent Event [Line Items]
Cash bonus payable subject to continued employment by the Company	$ 62,500	$ 62,500

- Definition

Represents the amount of cash bonus payable.

+ References

No definition available.

+ Details

Name:	sach_CashBonus
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of cash bonus payable immediately.

+ References

No definition available.

+ Details

Name:	sach_CashBonusImmediatelyPayable
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of cash bonus payable subject to continued employment by the Company.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of targeted annual bonus.

+ References

No definition available.

+ Details

Name:	sach_TargetedAnnualBonus
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of time-based equity award payable in restricted Common Shares.

+ References

No definition available.

+ Details

Name:	sach_TimeBasedEquityAwardPayableInRestrictedCommonShares
Namespace Prefix:	sach_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense for salary and wage arising from service rendered by officer. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Name:	us-gaap_OfficersCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: