STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($)			6 Months Ended		13 Months Ended	28 Months Ended
	Jan. 18, 2018	Jun. 16, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2016	Mar. 31, 2018	Dec. 31, 2017	Dec. 27, 2016	Dec. 15, 2015
Stockholders' Equity Note [Line Items]
Common stock, shares authorized (in shares)			450,000,000				450,000,000
Common stock, par value (in dollars per share)			$ 0.01				$ 0.01
Common stock, shares issued (in shares)			23,683,164				22,143,758
Common stock, shares outstanding (in shares)			23,683,164				22,143,758
Proceeds from issuance of common stock		$ 19,800,000	$ 7,278,201	$ 19,903,641
Stock repurchase program, authorized amount									$ 10,000,000
Preferred stock, shares authorized (in shares)			50,000,000				50,000,000
Preferred stock, par value (in dollars per share)			$ 0.01				$ 0.01
Preferred stock, shares issued (in shares)			1,610,000				1,610,000
Preferred stock, dividend rate, percentage			8.75%	8.75%
Preferred stock, liquidation preference (in dollars per share)			$ 25.00				$ 25
Preferred stock, shares outstanding (in shares)			1,610,000				1,610,000
Dividends payable			$ 29,349	$ 29,349			$ 39,132
Stock Repurchase Program
Stockholders' Equity Note [Line Items]
Common stock shares repurchased (in shares)			0		126,856	126,856
Weighted average share price of common stock repurchased (in dollars per share)					$ 5.09
Stock repurchase program, remaining authorized amount			$ 9,400,000
Series A 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
Common Stock
Stockholders' Equity Note [Line Items]
Common stock, shares issued (in dollars per share)		$ 4.60
Issuance of common stock, net (in shares)	1,539,406	4,600,000	1,539,406
Dividends payable			$ 3,735,675
Dividends payable, amount per share (in dollars per share)			$ 0.16
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	$ 7,300,000