Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Additional Information (Details)

v3.20.1
STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended
May 20, 2019
Mar. 31, 2020
Dec. 31, 2019
Class of Warrant or Right [Line Items]      
Stock Issued During Period, Shares, New Issues 1,982,000    
Share Price $ 2.50    
Gross proceeds from stockholders' equity $ 10    
Proceeds from issuance of common stock, net of underwriting issuance costs 6    
Proceeds from warrants 4    
Net proceeds from stockholders' equity 9    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   9,268,352  
Common Stock, Shares Authorized   80,000,000 80,000,000
Common Stock, Par or Stated Value Per Share   $ 0.00001 $ 0.00001
Proceeds from Issuance or Sale of Equity $ 9    
Series F warrants [Member]      
Class of Warrant or Right [Line Items]      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.40    
Exercise price of warrants (in dollars per share) 2.40    
Series G warrants [Member]      
Class of Warrant or Right [Line Items]      
Share Price $ 2.50    
Series C Preferred Stock [Member]      
Class of Warrant or Right [Line Items]      
Preferred Stock, Shares Outstanding   215 215
Private Placement [Member]      
Class of Warrant or Right [Line Items]      
Warrants expiration period 5 years    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.40    
Exercise price of warrants (in dollars per share) $ 2.40    
Private Placement [Member] | Series F warrants [Member]      
Class of Warrant or Right [Line Items]      
Warrants issued 1,982,000    
Private Placement [Member] | Series G warrants [Member]      
Class of Warrant or Right [Line Items]      
Stock Issued During Period, Shares, New Issues 2,018,000    
Warrants issued 2,018,000