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, 2020 USD ($) insturment contract mortgage_loan	Mar. 31, 2019	Jun. 30, 2019 insturment contract	Dec. 31, 2019 USD ($) mortgage_loan
Variable Interest Entity [Line Items]
Collateralized Loan Obligations	[1]	$ 506,416,518			$ 505,930,065
Commercial real estate portfolio segment
Variable Interest Entity [Line Items]
Number of Loans | mortgage_loan		51			51
Carrying Value		$ 639,366,297			$ 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		$ 506,416,518			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)		3.55%	3.60%
Interest fixed rate		1.40%	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		51		51
Face Amount
Variable Interest Entity [Line Items]
Collateralized Loan Obligations		$ 510,181,000			510,181,000
Face Amount | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		627,313,574			629,157,956
Collateralized Loan Obligations		510,181,000			510,181,000
Carrying Value
Variable Interest Entity [Line Items]
Collateralized Loan Obligations		506,416,518			505,930,065
Carrying Value | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value		627,313,574			629,157,956
Collateralized Loan Obligations		506,416,518			505,930,065
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized Loan Obligations		1,071,735			1,344,923
Carrying Value | Hunt CRE 2018-FL2, Ltd
Variable Interest Entity [Line Items]
Collateralized Loan Obligations		$ 2,692,747			$ 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 March 31, 2020 and December 31, 2019, assets of consolidated VIEs related to Hunt CRE 2017-F1, Ltd. and Hunt CRE 2018-FL2, Ltd. totaled 636,607,029 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 506,907,671 and $506,662,238 respectively. See Note 5 for further discussion.