Collateralized Loan Obligation, Reinvestment Period

No definition available.

Name:	oaks_CollateralizedLoanObligationReinvestmentPeriod
Namespace Prefix:	oaks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Weighted Average, Excluding Fees and Transaction Costs, Term

+ References

No definition available.

+ Details

Name:	oaks_DebtWeightedAverageExcludingFeesAndTransactionCostsTerm
Namespace Prefix:	oaks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Financing Receivable, Outstanding, Face Amount

+ References

No definition available.

+ Details

Name:	oaks_FinancingReceivableOutstandingFaceAmount
Namespace Prefix:	oaks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Initial Collateral Pool Securing Senior Debt Floating Rate Mortgage Loans, Basis Rate

+ References

No definition available.

+ Details

Name:	oaks_InitialCollateralPoolSecuringSeniorDebtFloatingRateMortgageLoansBasisRate
Namespace Prefix:	oaks_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Collateralization of Acquired Subsidiary, Aggregate Discount

+ References

No definition available.

+ Details

Name:	oaks_PercentageOfCollateralizationOfAcquiredSubsidiaryAggregateDiscount
Namespace Prefix:	oaks_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A

+ Details

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

- Definition

The cash outflow for the purchase of amounts due from customers, clients, lessees, borrowers, or others under the terms of its agreements therewith.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

+ Details

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

- Definition

The cash outflow for the purchase of a retained interest in a receivable securitized via a structured process whereby interests in loans and other receivables are packaged, underwritten, and sold in the form of asset-backed securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireRetainedInterestInSecuritizedReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

+ Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=oaks_LumentStructuredFinanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=us-gaap_CollateralizedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_MultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=oaks_SecuredOvernightFinancingRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=oaks_LMF20231FinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_InternalInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=oaks_LumentFinanceTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Details)	Jul. 12, 2023 USD ($) property loanAndParticipation	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Commercial Real Estate Portfolio Segment
Subsequent Event [Line Items]
Face amount		$ 1,021,956,208	$ 1,076,865,099
Subsequent Event \| Affiliated Entity \| Lument Structured Finance
Subsequent Event [Line Items]
Unfunded commitments	$ 28,600,000
Subsequent Event \| Senior Loans \| Collateralized Securities
Subsequent Event [Line Items]
Initial collateral pool securing senior debt floating rate mortgage loans, basis rate \| loanAndParticipation	25
Subsequent Event \| Senior Loans \| Collateralized Securities \| Multifamily \| UNITED STATES
Subsequent Event [Line Items]
Initial collateral pool securing senior debt floating rate mortgage loans, basis rate \| property	32
Subsequent Event \| Senior Loans \| Secured Overnight Financing Rate
Subsequent Event [Line Items]
Debt, weighted average interest rate	3.14%
Debt weighted average, excluding fees and transaction costs, term	30 days
Subsequent Event \| Senior Loans \| Secured Overnight Financing Rate \| Collateralized Securities
Subsequent Event [Line Items]
Debt, weighted average interest rate	3.65%
Debt weighted average, excluding fees and transaction costs, term	30 days
Subsequent Event \| LMF 2023-1 Financing \| Affiliated Entity \| Lument Structured Finance
Subsequent Event [Line Items]
Unpaid principal balance of purchased loans	$ 376,200,000
Subsequent Event \| LMF 2023-1 Financing \| Collateralized Securities
Subsequent Event [Line Items]
Reinvestment period	24 months
Subsequent Event \| LMF 2023-1 Financing \| Collateralized Securities \| Affiliated Entity \| Lument Structured Finance
Subsequent Event [Line Items]
Percentage of collateralization of acquired subsidiary, aggregate discount	1.50%
Subsequent Event \| LMF 2023-1 Financing \| Internal Investment Grade \| Senior Loans
Subsequent Event [Line Items]
Face amount	$ 47,300,000
Subsequent Event \| LMF 2023-1 Financing \| Internal Investment Grade \| Private Placement
Subsequent Event [Line Items]
Face amount	270,400,000
Subsequent Event \| LMF 2023-1 Financing \| Commercial Real Estate Portfolio Segment \| Internal Investment Grade \| Multifamily
Subsequent Event [Line Items]
Face amount	386,400,000
Subsequent Event \| Lument Finance Trust
Subsequent Event [Line Items]
Payments to retained subordinate interests	$ 68,600,000