STOCKHOLDERS' EQUITY - Additional Information (Details) - $ / shares	1 Months Ended	6 Months Ended
	Jan. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Class Of Stock [Line Items]
Common stock, authorized shares (in shares)		40,000,000
Common stock, par value (USD per share)		$ 0.0001
Number of warrants exercised		136,000	737,000
Number of warrants outstanding		71,000,000
Common Stock
Class Of Stock [Line Items]
Warrants outstanding exercisable		4,400,000
Series F Warrants
Class Of Stock [Line Items]
Warrants issued	400,000
Series C Warrants
Class Of Stock [Line Items]
Number of warrants exercised		2,800,000
Series D Warrants
Class Of Stock [Line Items]
Number of warrants exercised		2,800,000