EQUITY - Narrative (Details)				3 Months Ended			12 Months Ended
		Jan. 03, 2020 USD ($) $ / shares shares	Nov. 29, 2018 USD ($) shares	Mar. 31, 2021 USD ($) $ / shares shares		Mar. 31, 2020 USD ($) shares	Dec. 31, 2020 USD ($) $ / shares shares		Dec. 15, 2015 USD ($)
Stockholders' Equity Note [Line Items]
Common stock, shares authorized (in shares) | shares				450,000,000			450,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.01			$ 0.01
Common stock, shares outstanding (in shares) | shares				24,943,383			24,943,383
Common stock, shares issued (in shares) | shares				24,943,383			24,943,383
Stock repurchase program, authorized amount									$ 10,000,000
Dividends payable				$ 2,248,612	[1]	$ 1,874,166	$ 3,242,640	[1]
Noncontrolling interests	[1]			99,500			$ 99,500
Dividends on the HCMT Preferred Shares				$ 3,708		$ 3,750
Stock Repurchase Program
Stockholders' Equity Note [Line Items]
Number of shares repurchased (in shares) | shares				126,856
Weighted average share price of common stock repurchased (in dollars per share) | $ / shares				$ 5.09
Common stock repurchase activity (in shares) | shares				0
Stock repurchase program, remaining authorized amount				$ 9,400,000
Preferred Stock
Stockholders' Equity Note [Line Items]
Dividends payable				$ 3,708
Redeemable Preferred Stock
Stockholders' Equity Note [Line Items]
Preferred stock, shares authorized (in shares) | shares				50,000,000			50,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.01			$ 0.01
Preferred stock, shares issued (in shares) | shares				0			0
Preferred stock, shares outstanding (in shares) | shares				0			0
Common Stock
Stockholders' Equity Note [Line Items]
Issuance of common stock (in shares) | shares		1,246,719				1,246,719
Dividends payable				$ 2,244,904
Dividends payable, amount per share (in dollars per share) | $ / shares				$ 0.09
Noncontrolling interests | Preferred Stock
Stockholders' Equity Note [Line Items]
Number of shares issued (in shares) | shares			125
Noncontrolling interests			$ 99,500
Equity raised			125,000
Non-controlling interests expenses			$ 25,500
Dividend rate percentage			12.00%
Redemption price ratio							1.1
Dividends on the HCMT Preferred Shares							$ 15,000
Hunt | Private Placement
Stockholders' Equity Note [Line Items]
Common stock, shares issued (in dollars per share) | $ / shares		$ 4.61
Aggregate capital raise		$ 5,700,000

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs") as the Company was the primary beneficiary of these VIEs. As of March 31, 2021 and December 31, 2020, assets of consolidated VIEs related to Hunt CRE 2017-F1, Ltd. and Hunt CRE 2018-FL2, Ltd. totaled $537,399,673 and $591,318,506, respectively and the liabilities of consolidated VIEs related to Hunt CRE 2017-FL1, Ltd. and Hunt CRE 2018-FL2, Ltd totaled $409,716,943 and $463,411,967 respectively. See Note 4 for further discussion.