EQUITY - Narrative (Details) - USD ($)				3 Months Ended				12 Months Ended
	Feb. 14, 2019	Nov. 29, 2018	Jan. 18, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 27, 2016	Dec. 15, 2015
Stockholders' Equity Note [Line Items]
Common stock, shares authorized (in shares)				450,000,000	450,000,000			450,000,000
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01			$ 0.01
Common stock, shares, outstanding				23,687,664	23,687,664			23,687,664
Common stock, shares issued (in shares)				23,687,664	23,687,664			23,687,664
Stock repurchase program, authorized amount										$ 10,000,000
Preferred stock, shares authorized (in shares)				50,000,000	50,000,000			50,000,000
Preferred stock, par value (in dollars per share)				$ 0.01	$ 0.01			$ 0.01
Preferred stock, shares issued (in shares)				0	1,610,000			1,610,000
Preferred stock, shares outstanding (in shares)				0	1,610,000			1,610,000
Preferred stock, dividend rate, percentage				8.75%		8.75%		8.75%
Preferred stock, liquidation preference (in dollars per share)					$ 25			$ 25
Dividends payable				$ 1,661,844	$ 1,465,610	$ 39,132		$ 1,465,610
Noncontrolling interests				99,500	99,500			$ 99,500
Dividends on the HCMT Preferred Shares				$ 480,472	$ 880,509		$ 880,509
Stock Repurchase Program
Stockholders' Equity Note [Line Items]
Number of shares repurchased (in shares)				126,856	126,856			126,856
Common stock repurchase activity (in shares)				0
Weighted average share price of common stock repurchased (in dollars per share)				$ 5.09
Stock repurchase program, remaining authorized amount				$ 9,400,000
Preferred Stock
Stockholders' Equity Note [Line Items]
Preferred stock, par value (in dollars per share)					$ 0.01			$ 0.01
Preferred stock, dividend rate, percentage				8.75%
Preferred stock, liquidation preference (in dollars per share)				$ 25
Redeemable Preferred Stock
Stockholders' Equity Note [Line Items]
Preferred stock, shares outstanding (in shares)	1,610,000
Preferred stock, dividend rate, percentage	8.75%
Preferred stock, liquidation preference (in dollars per share)	$ 25
Common Stock
Stockholders' Equity Note [Line Items]
Issuance of common stock, net (in shares)			1,539,406
Dividends payable				$ 1,658,136
Dividends payable, amount per share (in dollars per share)				$ 0.07
Noncontrolling interests | Preferred Stock
Stockholders' Equity Note [Line Items]
Dividends payable				$ 3,708
Number of shares issued (in shares)		125
Noncontrolling interests		$ 99,500
Equity raised		125,000
non-controlling interests expenses		$ 25,500
Dividend rate percentage		12.00%
Dividends on the HCMT Preferred Shares								$ 1,333
XL Investments
Stockholders' Equity Note [Line Items]
Common stock shares into which warrants may be converted (in shares)			3,753,492						3,753,492
Common stock, shares issued (in dollars per share)			$ 13.11
Hunt | Private Placement
Stockholders' Equity Note [Line Items]
Common stock, shares issued (in dollars per share)			$ 4.77
Aggregate capital raise			$ 7,342,967