Financing receivable asset specific allowance.

No definition available.

Name:	ck0001690012_FinancingReceivableAssetSpecificAllowance
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing Receivable, Loan Settled with Full Satisfication of all Obligations , Amount

+ References

No definition available.

+ Details

Name:	ck0001690012_FinancingReceivableLoanSettledWithFullSatisficationOfAllObligationsAmount
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing receivable, modified loan balance including accrued and unpaid interest and lender fees, amount.

+ References

No definition available.

+ Details

Name:	ck0001690012_FinancingReceivableModifiedLoanBalanceIncludingAccruedAndUnpaidInterestAndLenderFeesAmount
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Mortgage loans on real estate loan written off.

+ References

No definition available.

+ Details

Name:	ck0001690012_MortgageLoansOnRealEstateLoanWrittenOff
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Mortgage loans on real estate, outstanding.

+ References

No definition available.

+ Details

Name:	ck0001690012_MortgageLoansOnRealEstateOutstanding
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Proceeds from financing receivable modified loan.

+ References

No definition available.

+ Details

Name:	ck0001690012_ProceedsFromFinancingReceivableModifiedLoan
Namespace Prefix:	ck0001690012_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Risk rating for commercial mortgage loans held for investment and real estate securities.

+ References

No definition available.

+ Details

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Namespace Prefix:	ck0001690012_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Maturity date of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, in YYYY-MM-DD format.

+ References

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-Section 12
-Subsection 29
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+ Details

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Namespace Prefix:	srt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

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

- Definition

The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

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+ Details

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

- Definition

The cash outflow from the repayment of a long-term debt instrument issued, secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

+ References

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-Section 45
-Paragraph 15
-Subparagraph (b)
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+ Details

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

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_LasVegasNvMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ck0001690012_ForbearanceAndModificationAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_MemphisTnLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ck0001690012_DiscountedPayoffAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_SanDiegoCaLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_UnfundedLoanCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_ArlingtonTxLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_HonoluluHILoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_MangoniaParkFLLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=ck0001690012_ConverseTXLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: