USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Condensed Consolidated Balance Sheets (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Cash, cash equivalents and restricted cash	$ 50,041,781	$ 59,213,812	$ 81,312,767	$ 45,622,602
Accrued interest receivable	2,595,178	2,430,790
Investment related receivable	0	33,042,234
Loans held for investment	599,770,362	555,172,891
Total assets	657,354,399	679,352,035
Accrued interest payable	857,026	1,231,649
Collateralized loan obligations	504,946,473	503,978,918
Total liabilities	548,488,277	529,148,697
Equity	108,766,622	150,103,838
Total liabilities and equity	657,354,399	679,352,035
Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd.
Variable Interest Entity [Line Items]
Cash, cash equivalents and restricted cash	42,877,534	51,330,950
Accrued interest receivable	2,556,557	2,398,905
Investment related receivable	0	32,666,128
Loans held for investment	591,350,135	550,555,503
Total assets	636,784,226	636,951,486
Accrued interest payable	800,285	867,794
Collateralized loan obligations	504,946,473	503,978,918
Total liabilities	505,746,758	504,846,712
Equity	131,037,468	132,104,774
Total liabilities and equity	$ 636,784,226	$ 636,951,486