STOCKHOLDERS' EQUITY - PUBLIC OFFERING (Details) - Underwritten Public Offering - USD ($)		6 Months Ended
	May 27, 2020	Jun. 30, 2020
Public Offering [Line Items]
Issuance of common stock in connection with public offering	107,049,375
Net proceeds from public offering after deducting underwriting discount and other offering expenses	$ 140,184,000
Combined public offering price per share of common stock and accompanying stock purchase warrants	$ 1.30
Offering expenses accrued and unpaid		$ 610,000
Stock Purchase Warrants
Public Offering [Line Items]
Warrants to purchase common stock, exercise price	$ 1.30
Warrants to purchase common stock, shares	57,692,307
Pre-Funded Warrants
Public Offering [Line Items]
Warrants to purchase common stock, exercise price	$ 0.001
Warrants to purchase common stock, shares	8,335,239
Combined public offering price per share of pre-funded warrants and accompanying stock purchase warrants	$ 1.299