MORTGAGE SERVICING RIGHTS - Components of Servicing Income (Details) - Mortgages - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule Of Components Of Servicing Income [Line Items]
Servicing income, net	$ 50,423	$ 60,283	$ 128,502	$ 117,056
Total servicing income	$ 50,423	$ 60,283	$ 128,502	$ 117,056

It represents the income from mortgage loans on real estate.

No definition available.

Name:	oaks_IncomeFromMortgageLoansOnRealEstate
Namespace Prefix:	oaks_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration