COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Summary of Commercial Loan Risk Ratings (Details)		9 Months Ended	12 Months Ended
		Sep. 30, 2025 USD ($) mortgageLoan	Dec. 31, 2024 USD ($) mortgageLoan
Financing Receivable, Credit Quality Indicator [Line Items]
Outstanding Principal	[1]	$ 835,863,888	$ 1,060,123,298
Commercial Real Estate Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		51	65
Outstanding Principal		$ 839,749,478	$ 1,065,563,646
Year 1		3,589,519	58,068,230
Year 2		31,128,363	17,973,555
Year 3		17,986,869	511,654,760
Year 4		401,408,855	$ 461,106,533
Year 5		$ 367,729,874
Commercial Real Estate Portfolio Segment | Risk rating, 1
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		0	0
Outstanding Principal		$ 0	$ 0
Year 1		0	0
Year 2		0	0
Year 3		0	0
Year 4		0	$ 0
Year 5		$ 0
Commercial Real Estate Portfolio Segment | Risk rating, 2
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		6	3
Outstanding Principal		$ 68,592,180	$ 57,840,000
Year 1		3,589,519	27,048,495
Year 2		0	0
Year 3		0	30,416,761
Year 4		64,377,719	$ 0
Year 5		$ 0
Commercial Real Estate Portfolio Segment | Risk rating, 3
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		18	40
Outstanding Principal		$ 310,374,570	$ 616,637,103
Year 1		0	31,019,735
Year 2		31,128,363	17,973,555
Year 3		17,986,869	266,895,843
Year 4		156,538,080	$ 294,277,177
Year 5		$ 102,005,156
Commercial Real Estate Portfolio Segment | Risk rating, 4
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		20	16
Outstanding Principal		$ 374,220,488	$ 292,826,616
Year 1		0	0
Year 2		0	0
Year 3		0	140,183,307
Year 4		127,592,859	$ 147,641,857
Year 5		$ 241,752,690
Commercial Real Estate Portfolio Segment | Risk rating, 5
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		7	6
Outstanding Principal		$ 86,562,240	$ 98,259,927
Year 1		0	0
Year 2		0	0
Year 3		0	74,158,849
Year 4		52,900,197	$ 19,187,499
Year 5		$ 23,972,028

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs") as the Company was the primary beneficiary of these VIEs. As of September 30, 2025 and December 31, 2024, assets of consolidated VIEs totaled $894,395,215 and $1,058,138,406, respectively and the liabilities of consolidated VIEs totaled $672,585,820 and $831,001,605 respectively. See Note 4 for further discussion.