RESTRICTED CASH AND DUE TO BROKER - Summary of Restricted Cash Balances (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Restricted Cash and Cash Equivalents Items [Line Items]
Due to broker	$ 0	$ (1,123,463)
Restricted cash	51,330,950	11,275,263
Total	51,330,950	10,151,800
Broker counterparties for derivatives trading
Restricted Cash and Cash Equivalents Items [Line Items]
Due to broker	0	(1,123,463)
Repurchase counterparties as restricted collateral
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	11,275,263
Hunt CRE 2017-FL1, Ltd.
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	24,085,890	0
Hunt CRE 2018-FL2, Ltd.
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 27,245,060	$ 0

Restricted Cash and Cash Equivalents, Net of Due to (from) Broker-Dealers

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- Definition

Amount payable to broker-dealers and clearing organizations, including, but not limited to, securities failed-to-receive, certain deposits received for securities loaned, open transactions, and floor-brokerage payables.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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