PREFERRED STOCK AND TEMPORARY EQUITY - Schedule of BCF Determined by Calculating Intrinsic Value of Conversion Feature of Series B1 Preferred Stock (Details) - USD ($)	Dec. 31, 2019	Jun. 24, 2017	May 13, 2016	May 10, 2016	Jun. 24, 2015
Class of Stock [Line Items]
Market price (in dollars per unit)				$ 1.52	$ 2.91
Series B1 Preferred Stock
Class of Stock [Line Items]
Face amount of Series B1 Preferred Stock			$ 19,349,745
Less: allocated value of May 2016 Warrants	$ 1,818,658		2,867,264
Allocated value of Series B Preferred Stock			$ 16,482,481
Shares of Common stock to be converted			12,403,683
Effective conversion price (in dollars per share)		$ 1.72	$ 1.33
Market price (in dollars per unit)			1.52
Intrinsic value per share (in dollars per share)			$ 0.19
Intrinsic value of May 2016 beneficial conversion feature			$ 2,371,106