PREFERRED STOCK AND TEMPORARY EQUITY -Series B Preferred Stock and Temporary Equity Narrative (Details)				1 Months Ended	12 Months Ended
	May 10, 2016 USD ($) shares warrant $ / shares $ / unit	Jun. 30, 2015 $ / shares	Jun. 24, 2015 USD ($) shares warrant $ / shares $ / unit	May 31, 2016 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)	Jun. 24, 2017 $ / shares	May 13, 2016 USD ($) $ / shares
Class of Stock [Line Items]
Number of units sold (in shares) | shares	12,403,683		8,064,534
Unit Purchase Agreement, number of warrants per unit | warrant	1
Unit Purchase Agreement, price per unit (in dollars per share) | $ / unit	1.56		3.10
Unit Purchase Agreement, exercise price (in dollars per share)	2.60%		6.10%
Share price (in dollars per unit)	$ 1.52		$ 2.91
Gross proceeds from issuance of private placement | $	$ 19,400,000		$ 25,000,000.0
Commission percentage of gross proceeds			6.50%	6.50%
Amount raised for certain investors with no fee | $			$ 4,000,000
Commissions payment | $			$ 1,400,000	$ 610,000
Unit Purchase Agreement, liquidated damages, percentage of aggregate subscription amount			1.00%	1.00%
Unit Purchase Agreement, maximum percentage of liquidated damages to aggregate subscription amount			6.00%	6.00%
Warrants issued, Black Scholes model, value | $			$ 7,028,067
Beneficial conversion feature | $			5,737,796
Private placement fees | $			$ 1,400,000
Derivative warrant liability | $					$ 1,481,692	$ 2,245,408
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend rate					6.00%
Preferred stock, dividends in arrears (in dollars per share)					$ 3.10
Minimum dividend payment price (in dollars per share)		$ 2.91
Dividends payable, paid-in-kind (in dollars per share)					3.10
Liquidation preference per share (in dollars per share)					3.10
Redemption price per share (in dollars per share)					3.10
Conversion terms, closing price (in dollars per share)					$ 6.20
Conversion terms, threshold consecutive trading days					20 days
Conversion terms, beneficial ownership limitation (as a percent)					9.999%
Unit Purchase Agreement, number of shares per unit (in shares) | shares			1
Share price (in dollars per unit)			$ 2.94
Temporary equity, warrants issued | $			$ 7,028,067		$ 256,458
Dividends payable | $					$ 167,642	139,186
Series B1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend rate				6.00%
Preferred stock, dividends in arrears (in dollars per share)				$ 1.56
Minimum dividend payment price (in dollars per share)				1.52
Dividends payable, paid-in-kind (in dollars per share)				1.56
Liquidation preference per share (in dollars per share)				1.56
Redemption price per share (in dollars per share)							$ 1.72
Conversion terms, closing price (in dollars per share)				$ 3.90
Conversion terms, threshold consecutive trading days				20 days
Conversion terms, beneficial ownership limitation (as a percent)					4.999%
Unit Purchase Agreement, number of shares per unit (in shares) | shares	1
Share price (in dollars per unit)								$ 1.52
Beneficial conversion feature | $				$ 2,371,106
Private placement fees | $				600,000
Temporary equity, warrants issued | $					$ 1,243,234			$ 2,867,264
Dividends payable | $					$ 235,360	$ 281,527
Liability | Series B Preferred Stock
Class of Stock [Line Items]
Expected term (years)					2 years
Liability | Series B1 Preferred Stock
Class of Stock [Line Items]
Expected term (years)					3 years
Liability | Expected dividend rate
Class of Stock [Line Items]
Warrant measurement input					0.00
Liability | Risk Free interest rate | Series B Preferred Stock
Class of Stock [Line Items]
Warrant measurement input					0.0263
Liability | Risk Free interest rate | Series B1 Preferred Stock
Class of Stock [Line Items]
Warrant measurement input					0.0248
Minimum | Liability | Expected volatility rate | Series B Preferred Stock
Class of Stock [Line Items]
Warrant measurement input					0.64
Minimum | Liability | Expected volatility rate | Series B1 Preferred Stock
Class of Stock [Line Items]
Warrant measurement input					0.64
Maximum | Series B1 Preferred Stock
Class of Stock [Line Items]
Conversion terms, beneficial ownership limitation (as a percent)					9.999%
Maximum | Liability | Expected volatility rate
Class of Stock [Line Items]
Warrant measurement input					1
Maximum | Liability | Expected volatility rate | Series B Preferred Stock
Class of Stock [Line Items]
Warrant measurement input					1
Warrant
Class of Stock [Line Items]
Unit Purchase Agreement, number of warrants per unit | warrant			1
Number of shares called by each warrant (in shares) | shares	0.25		0.5
Exercise price of warrants (in dollars per share)	$ 1.53		$ 2.92
Amount over closing price of warrant exercise price (in dollars per share)	$ 0.01		$ 0.01
Warrant | Series B1 Preferred Stock
Class of Stock [Line Items]
Derivative warrant liability | $				$ 2,867,264