STOCKHOLDERS’ EQUITY (DEFICIT) - Narrative (Details) - USD ($)
3 Months Ended
May 04, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jul. 22, 2020
Apr. 29, 2020
Class of Stock [Line Items]            
Capital stock authorized (in shares)   360,000,000        
Common stock, par or stated value per share (in dollars per share)   $ 0.0001   $ 0.0001    
Common stock, shares authorized (in shares)   350,000,000   350,000,000    
Preferred stock, shares authorized (in shares)   10,000,000   10,000,000   600,000
Preferred stock, par or stated value per share (in dollars per share)   $ 0.0001   $ 0.0001   $ 0.0001
Conversion feature $ 3,100,000          
Preferred stock, value, issued 12,500,000 $ 0   $ 0    
Preferred stock, value, outstanding $ 7,000,000.0          
Preferred stock, shares outstanding (in shares)   0   0    
Common stock, shares, outstanding (in shares)   216,324,896   204,629,064    
SunTrust Robinson Humphrey            
Class of Stock [Line Items]            
Sale of stock, ATM maximum equity offering price         $ 40,000,000  
Sale of stock, agent commissions fee   3.00%        
At-the-Market Offering | Truist Securities, Inc            
Class of Stock [Line Items]            
Number of shares issued in transaction (in shares)   0 0      
Series A Preferred Stock | Private Placement            
Class of Stock [Line Items]            
Preferred stock, par or stated value per share (in dollars per share) $ 0.0001          
Number of shares issued in transaction (in shares) 382,779          
Common shares issuable upon conversion (in shares) 38,277,900          
Number of securities called by each warrant (in shares) 100          
Preferred Stock Warrant | Private Placement            
Class of Stock [Line Items]            
Number of securities called by each warrant (in shares) 100