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USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Summary of Loan and Borrowing Characteristics (Details)		3 Months Ended	12 Months Ended
		Mar. 31, 2026 USD ($) instrument contract mortgageLoan	Dec. 31, 2025 USD ($) instrument rEOAsset mortgageLoan contract
Variable Interest Entity [Line Items]
Collateralized loan obligations and secured financings	[1]	$ 580,302,828	$ 748,433,484
Less: Allowance for credit losses	[1]	$ (19,543,903)	$ (22,658,121)
One month SOFR rate ( as a percent)			3.85%
Weighted average LIBOR floor rate (as a percent)		2.66%	2.55%
SOFR spread rate (as a percent)		3.21%	3.27%
Basis spread on one-month LIBOR (percent)		1.91%	2.24%
Collateralized Loan Obligations
Variable Interest Entity [Line Items]
One month SOFR rate ( as a percent)		3.67%	3.86%
30-Day SOFR
Variable Interest Entity [Line Items]
Weighted average, floating rate loan %		100.00%	100.00%
30-day SOFR rate		0.0367	0.0374
Commercial Real Estate Portfolio Segment
Variable Interest Entity [Line Items]
Collateral (loan investments) (Count) | mortgageLoan		57	61
Carrying value		$ 1,127,604,965	$ 1,136,706,113
Net of purchase discounts		$ 1,255,406	$ 1,657,584
Weighted average, floating rate loan %		100.00%	100.00%
LMNT 2025-FL3 CLO
Variable Interest Entity [Line Items]
Financings provided, (Count) | instrument		1
Collateralized loan obligations and secured financings		$ 580,032,828
LMNT 2025-FL3 CLO | Secured Overnight Financing Rate (SOFR)
Variable Interest Entity [Line Items]
Weighted average yield (percent)		7.02%
Weighted average yield (percent)		5.58%
LMNT 2025-FL3 CLO | Commercial Real Estate Portfolio Segment
Variable Interest Entity [Line Items]
Collateral (loan investments) (Count) | contract		30
LMNT 2025-FL3 CLO and LMF 2023-1 Financing
Variable Interest Entity [Line Items]
Financings provided, (Count) | instrument			2
Collateralized loan obligations and secured financings			$ 748,433,484
LMNT 2025-FL3 CLO and LMF 2023-1 Financing | Secured Overnight Financing Rate (SOFR)
Variable Interest Entity [Line Items]
Weighted average yield (percent)			7.11%
Weighted average yield (percent)			5.98%
LMNT 2025-FL3 CLO and LMF 2023-1 Financing | Commercial Real Estate Portfolio Segment
Variable Interest Entity [Line Items]
Collateral (loan investments) (Count) | contract			44
Number of REO Assets | rEOAsset			1
Principal Value | LMNT 2025-FL3 CLO
Variable Interest Entity [Line Items]
Carrying value		$ 656,985,469
Collateralized loan obligations and secured financings		584,983,000
Net of purchase discounts		0
Principal Value | LMNT 2025-FL3 CLO and LMF 2023-1 Financing
Variable Interest Entity [Line Items]
Carrying value			$ 873,054,065
Real estate owned, held-for-investment			11,467,505
Collateralized loan obligations and secured financings			754,638,462
Net of purchase discounts			1,595,224
Carrying Value | LMNT 2025-FL3 CLO
Variable Interest Entity [Line Items]
Carrying value		655,905,141
Collateralized loan obligations and secured financings		580,302,828
Debt issuance costs		$ 4,680,172	4,912,883
Carrying Value | LMNT 2025-FL3 CLO and LMF 2023-1 Financing
Variable Interest Entity [Line Items]
Carrying value			856,064,489
Real estate owned, held-for-investment			10,906,169
Collateralized loan obligations and secured financings			748,433,484
Carrying Value | LMF 2023-1 Financing
Variable Interest Entity [Line Items]
Debt issuance costs			$ 1,292,096
[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 March 31, 2026 and December 31, 2025, assets of consolidated VIEs totaled $666,553,315 and $889,507,091, respectively and the liabilities of consolidated VIEs totaled $581,030,250 and $750,274,556 respectively. See Note 4 for further discussion.

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