USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Summary of Loan and Borrowing Characteristics (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Collateralized loan obligations	$ 504,946,473	$ 503,978,918
Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations	504,946,473	503,978,918
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]
Unpaid Principal Balance	591,350,135	550,555,503
Collateralized loan obligations	510,181,000	510,181,000
Carrying Value
Variable Interest Entity [Line Items]
Collateralized loan obligations	504,946,473	503,978,918
Carrying Value | Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Carrying Value	591,350,135	550,555,503
Collateralized loan obligations	504,946,473	503,978,918
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations	1,897,301	2,440,674
Carrying Value | Hunt CRE 2018-FL2, Ltd
Variable Interest Entity [Line Items]
Collateralized loan obligations	$ 3,337,226	$ 3,761,410