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MORTGAGE SERVICING RIGHTS - Components of Servicing Income (Details) - Mortgages - USD ($) | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Schedule Of Components Of Servicing Income [Line Items] |  |
Servicing income, net | $ 54,421 | $ 64,880
Total servicing income | $ 54,421 | $ 64,880

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- Definition It represents the income from mortgage loans on real estate. + References No definition available. + Details
Name: | oaks_IncomeFromMortgageLoansOnRealEstate
Namespace Prefix: | oaks_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition It represents the mortgage loans on real estate net. + References No definition available. + Details
Name: | oaks_MortgageLoansOnRealEstateNet
Namespace Prefix: | oaks_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | oaks_ScheduleOfComponentsOfServicingIncomeLineItems
Namespace Prefix: | oaks_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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