SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
 3 Months Ended
Mar. 30, 2021
$ / shares
shares
Dec. 15, 2020
USD ($)
Dec. 11, 2020
$ / shares
shares
Jun. 30, 2020
shares
May 04, 2020
USD ($)
$ / shares
shares
Apr. 29, 2020
USD ($)
$ / shares
shares
Dec. 19, 2019
shares
Mar. 31, 2021
USD ($)
segment
$ / shares
shares
Mar. 31, 2020
USD ($)
shares
Dec. 31, 2020
$ / shares
Oct. 02, 2020
USD ($)
Jul. 22, 2020
USD ($)
Apr. 29, 2019
$ / shares
Significant Accounting Policies Disclosure [Line Items]                          
Sale of stock, shelf registration maximum equity offering price | $                     $ 200,000,000    
Exercise price of warrants or rights (in dollars per share) | $ / shares           $ 0.10              
Expected term         5 years                
Number of shares issued per warrant (in shares)             1.2            
Issuance of common stock and warrants (in shares)           12,230,418              
Proceeds from issuance of common stock and warrants | $           $ 1,200,000              
Preferred stock, par or stated value per share (in dollars per share) | $ / shares           $ 0.0001   $ 0.0001   $ 0.0001      
Proceeds from issuance of preferred stock and warrants | $         $ 22,600,000                
Proceeds from issuance of preferred stock and warrants, net. | $         $ 19,200,000                
Warrants, accumulated gross unrealized gain | $               $ 7,000          
Warrant inducement expense | $               0 $ 690,839        
Change in fair value of warrant liabilities | $               0 (1,578,800)        
General and administrative expense | $               $ 2,208,800 $ 1,669,807        
Antidilutive securities excluded from computation of earnings per share (in shares)               47,681,586 21,247,679        
Number of operating segments | segment               1          
Patent Costs                          
Significant Accounting Policies Disclosure [Line Items]                          
General and administrative expense | $               $ 99,000 $ 85,000        
Warrant                          
Significant Accounting Policies Disclosure [Line Items]                          
Exercise price of warrants or rights (in dollars per share) | $ / shares                         $ 2.13
Expected term                         5 years 6 months
Number of securities called by warrants or rights (in shares)             5,441,023 1,847,309          
Number of warrants purchased (in shares)               1,539,424          
Placement Agent Warrants                          
Significant Accounting Policies Disclosure [Line Items]                          
Exercise price of warrants or rights (in dollars per share) | $ / shares                         $ 2.53
Expected term                         5 years
Exchange Warrants                          
Significant Accounting Policies Disclosure [Line Items]                          
Warrant inducement expense | $               $ 0 $ 700,000        
Private Placement | Series A Preferred Stock                          
Significant Accounting Policies Disclosure [Line Items]                          
Exercise price of warrants or rights (in dollars per share) | $ / shares         $ 58.94     $ 0.5894          
Expected term           5 years              
Number of securities called by warrants or rights (in shares)         382,779                
Warrant issuable per investment unit (in shares)           1              
Broker Warrants                          
Significant Accounting Policies Disclosure [Line Items]                          
Units warrant units issued (in shares)         8,112                
Broker Warrants | Series A Preferred Stock                          
Significant Accounting Policies Disclosure [Line Items]                          
Number of securities called by warrants or rights (in shares)         10,899                
Public Stock Offering                          
Significant Accounting Policies Disclosure [Line Items]                          
Number of shares issued in transaction (in shares) 30,000,000   46,153,847                    
Shares issued, price per share (in usd per share) | $ / shares $ 1.00   $ 0.65                    
Consideration received on transaction | $   $ 32,000,000.0                      
Public Stock Offering | Officers And Board Of Directors Chairman                          
Significant Accounting Policies Disclosure [Line Items]                          
Number of shares issued in transaction (in shares)     446,153                    
Over-Allotment Option                          
Significant Accounting Policies Disclosure [Line Items]                          
Number of shares issued in transaction (in shares) 4,500,000   6,923,077                    
Sale of stock, option period     30 days         30 days          
Series A Preferred Stock | Private Placement                          
Significant Accounting Policies Disclosure [Line Items]                          
Preferred stock, par or stated value per share (in dollars per share) | $ / shares         $ 0.0001                
Common shares issuable upon conversion (in shares)         38,277,900                
Number of shares issued in transaction (in shares)         382,779                
Shares issuable per investment unit (in shares)           1              
Series A Preferred Stock | Broker Warrants                          
Significant Accounting Policies Disclosure [Line Items]                          
Common shares issuable upon conversion (in shares)         2,712,300                
SunTrust Robinson Humphrey                          
Significant Accounting Policies Disclosure [Line Items]                          
Sale of stock, ATM maximum equity offering price | $                       $ 40,000,000  
Common Stock                          
Significant Accounting Policies Disclosure [Line Items]                          
Conversion of preferred stock to common stock (in shares)       38,277,900