SERIES K PREFERRED STOCK (Summary of Closings and Proceeds Received) (Details) - Series K Preferred Stock [Member] - USD ($)			12 Months Ended
	Jul. 27, 2017	Feb. 24, 2017	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			0	2,810
Private Placement, Closing Period Q1 2017 [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			150
Proceeds from issuance of preferred stock			$ 150,000
Private Placement, Closing Period Q2 2017 [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			4,100
Proceeds from issuance of preferred stock			$ 4,100,000
Private Placement, Closing Period Q3 2017 [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			4,760
Proceeds from issuance of preferred stock			$ 4,760,000
Private placement [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			9,010
Proceeds from issuance of preferred stock	$ 15,000,000	$ 1,000,000	$ 9,010,000