STOCKHOLDERS' EQUITY - Dividends Declared (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Dividends [Line Items]
Dividend Amount	$ 29,349	$ 39,132	$ 29,349
Common Stock
Dividends [Line Items]
Dividend Amount	$ 3,735,675
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.16
Distribution One | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.18230
Distribution One | Common Stock
Dividends [Line Items]
Dividend Amount	$ 737,388
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.03152
Distribution Two | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.18230
Distribution Two | Common Stock
Dividends [Line Items]
Dividend Amount	$ 788,649
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.03371
Distribution Three | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.18230
Distribution Three | Common Stock
Dividends [Line Items]
Dividend Amount	$ 788,649
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.03371
Distribution Four | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.1823
Distribution Four | Common Stock
Dividends [Line Items]
Dividend Amount	$ 473,663
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.04534
Distribution Five | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.1823
Distribution Five | Common Stock
Dividends [Line Items]
Dividend Amount	$ 473,663
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.04534
Distribution Six | Series A Preferred Stock
Dividends [Line Items]
Dividend Amount	$ 293,503
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.1823
Distribution Six | Common Stock
Dividends [Line Items]
Dividend Amount	$ 473,663
Cash Dividend Per Weighted Average Share (in dollars per share)	$ 0.04534