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COVID-19 (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) loan | Jun. 30, 2020 USD ($) loan
COVID-19 |  |
Number of COVID-19 forbearance requests | loan | 0 | 23
Mortgages receivable for COVID-19 forbearance requests |  | $ 6,500,000
Deferred interest |  | $ 200,000
Investment of Covid19 Vaccine | $ 100,000,000 |

X
- Definition Deferred interest for COVID-19 forbearance requests. + References No definition available. + Details
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X
- Definition Amount of investment for Covid19 vaccine + References No definition available. + Details
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Namespace Prefix: | sach_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Mortgage loan receivables on COVID-19 forbearance requests. + References No definition available. + Details
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Namespace Prefix: | sach_
Data Type: | xbrli:integerItemType
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- Definition The amount of mortgage receivable for COVID-19 forbearance requests. + References No definition available. + Details
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Namespace Prefix: | sach_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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