STOCKHOLDERS' EQUITY (Deemed Dividends) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Amount Recorded	$ 0	$ 0	$ 0	$ 3,344
2018 Purchase Agreement | Deemed Dividend A
Class of Stock [Line Items]
Amount Recorded				3,333
2018 Purchase Agreement | Deemed Dividend B
Class of Stock [Line Items]
Amount Recorded				6
2018 Purchase Agreement | Deemed Dividend C
Class of Stock [Line Items]
Amount Recorded				$ 5