USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Summary of Loan and Borrowing Characteristics (Details)		3 Months Ended	6 Months Ended	12 Months Ended
		Mar. 31, 2021 USD ($) insturment mortgage_loan contract	Jun. 30, 2020	Dec. 31, 2020 USD ($) insturment contract mortgage_loan
Variable Interest Entity [Line Items]
Collateralized loan obligations	[1]	$ 409,404,872		$ 463,060,090
Commercial real estate portfolio segment
Variable Interest Entity [Line Items]
Number of Loans | mortgage_loan		34		40
Carrying Value		$ 484,165,249		$ 547,345,334
Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Number of notes issued | insturment		2		2
Collateralized loan obligations		$ 409,404,872		$ 463,060,090
Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd. | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Weighted Average Yield (as a percentage)		3.53%	3.50%
Interest fixed rate		1.50%	1.44%
Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd. | Commercial real estate portfolio segment
Variable Interest Entity [Line Items]
Number of Loans | contract		34		40
Face Amount
Variable Interest Entity [Line Items]
Collateralized loan obligations				$ 465,316,126
Face Amount | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		$ 468,945,755		531,363,401
Collateralized loan obligations		411,242,221		465,316,126
Carrying Value
Variable Interest Entity [Line Items]
Collateralized loan obligations				463,060,090
Carrying Value | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		468,945,755		531,363,401
Collateralized loan obligations		409,404,872		463,060,090
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations		0		207,767
Carrying Value | Hunt CRE 2018-FL2, Ltd
Variable Interest Entity [Line Items]
Collateralized loan obligations		$ 1,837,349		$ 2,048,269

[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, 2021 and December 31, 2020, assets of consolidated VIEs related to Hunt CRE 2017-F1, Ltd. and Hunt CRE 2018-FL2, Ltd. totaled $537,399,673 and $591,318,506, respectively and the liabilities of consolidated VIEs related to Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd totaled $409,716,943 and $463,411,967 respectively. See Note 4 for further discussion.