USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Summary of Loan and Borrowing Characteristics (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	$ 504,460,023	$ 503,978,918
Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	504,460,023	503,978,918
Face Amount
Variable Interest Entity [Line Items]
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	510,181,000	510,181,000
Face Amount | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Unpaid Principal Balance	581,878,684	550,555,503
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	510,181,000	510,181,000
Carrying Value
Variable Interest Entity [Line Items]
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	504,460,023	503,978,918
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Carrying Value	581,878,684	550,555,503
Collateralized loan obligations (net of discount of $2,170,488 and $2,440,674 and deferred financing costs of $3,550,489 and $3,761,410 for March 31, 2019 and December 31, 2018, respectively)	$ 504,460,023	$ 503,978,918