COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Funded participation interests	$ 6,900,000
Unfunded commitment related to loans held-for-investment	10,200,000
Hunt CRE 2017-FL1, Ltd.
Loss Contingencies [Line Items]
Funded participation interests	6,900,000	$ 5,600,000
Unfunded commitment related to loans held-for-investment	10,200,000	24,600,000
Hunt CRE 2018-FL2, Ltd
Loss Contingencies [Line Items]
Unfunded commitment related to loans held-for-investment	$ 23,800,000	$ 25,800,000