STOCKHOLDERS' EQUITY (DEFICIT) (Preferred Stock) (Details) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	25,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	750,000	750,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares outstanding (in shares)	48,100	60,756
Series B-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	2,000
Preferred stock, shares outstanding (in shares)	0
Series B-2 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	1,000
Preferred stock, shares outstanding (in shares)	0
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	1,000
Preferred stock, shares outstanding (in shares)	0
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	3,000
Preferred stock, shares outstanding (in shares)	0
Series D-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	2,500
Preferred stock, shares outstanding (in shares)	0
Series E Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	2,800
Preferred stock, shares outstanding (in shares)	0
Series F Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	7,000
Preferred stock, shares outstanding (in shares)	0
Series G Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	2,000
Preferred stock, shares outstanding (in shares)	0
Series H Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	2,500
Preferred stock, shares outstanding (in shares)	0
Series I Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	1,000
Preferred stock, shares outstanding (in shares)	0
Series J Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	1,350
Preferred stock, shares outstanding (in shares)	0
Series J-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	1,000
Preferred stock, shares outstanding (in shares)	0
Series K Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	20,000
Preferred stock, shares outstanding (in shares)	0