USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Summary of Loan and Borrowing Characteristics (Details)		9 Months Ended	12 Months Ended
		Sep. 30, 2020 USD ($) mortgage_loan insturment contract	Dec. 31, 2019 USD ($) contract mortgage_loan insturment
Variable Interest Entity [Line Items]
Collateralized loan obligations	[1]	$ 479,704,710	$ 505,930,065
Commercial real estate portfolio segment
Variable Interest Entity [Line Items]
Number of Loans | mortgage_loan		44	51
Carrying Value		$ 598,933,122	$ 635,260,420
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		$ 479,704,710	$ 505,930,065
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%	3.60%
Interest fixed rate		1.43%	1.40%
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		44	51
Face Amount | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		$ 582,771,880	$ 629,157,956
Collateralized loan obligations		482,440,642	510,181,000
Carrying Value | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		582,771,880	629,157,956
Collateralized loan obligations		479,704,710	505,930,065
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations		472,055	1,344,923
Carrying Value | Hunt CRE 2018-FL2, Ltd
Variable Interest Entity [Line Items]
Collateralized loan obligations		$ 2,263,877	$ 2,906,012

[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, 2020 and December 31, 2019, assets of consolidated VIEs related to Hunt CRE 2017-F1, Ltd. and Hunt CRE 2018-FL2, Ltd. totaled $608,690,756 and $636,541,489, respectively and the liabilities of consolidated VIEs related to Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd totaled $480,043,366 and $506,662,238 respectively. See Note 5 for further discussion.