Quarterly report pursuant to Section 13 or 15(d)

CAPITAL STOCK - Narrative (Details)

v3.21.2
CAPITAL STOCK - Narrative (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 31, 2020
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Feb. 29, 2020
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Apr. 19, 2021
shares
Mar. 31, 2021
USD ($)
Dec. 31, 2020
$ / shares
shares
Sep. 30, 2020
$ / shares
Apr. 30, 2020
USD ($)
Class of Stock [Line Items]                      
Common stock, par value (in usd per share) | $ / shares       $ 0.01 $ 0.01       $ 0.01    
Common stock, shares authorized       300,000,000 300,000,000   300,000,000   100,000,000    
Sale of stock, expiration term 5 years                    
Proceeds from the exercise of warrants | $         $ 8,969,000 $ 22,000          
Common stock, shares issued       71,945,222 71,945,222       53,551,461    
Aggregate purchase price for stock and warrants | $   $ 200,000                  
Preferred shares authorized       5,000,000 5,000,000            
Temporary equity, par or stated value per share (in dollars per share) | $ / shares       $ 0.01 $ 0.01            
Preferred stock shares outstanding       0 0            
Common stock warrants                      
Class of Stock [Line Items]                      
Exercise price (in usd per share) | $ / shares       $ 0.72 $ 0.72            
Lincoln Park                      
Class of Stock [Line Items]                      
Purchase obligation | $     $ 28,000,000.0                
Purchase obligation, term     36 months                
Maximum commitment purchase amount | $     $ 1,000,000                
Percentage of ownership after transaction     9.99%                
Pre-Funded Warrant                      
Class of Stock [Line Items]                      
Exercise price (in usd per share) | $ / shares $ 0.001                 $ 0.001  
October 2020 Offering                      
Class of Stock [Line Items]                      
Number of shares authorized to be repurchased 20,833,322                    
Exercise price (in usd per share) | $ / shares       $ 0.72 $ 0.72            
Consideration received on transaction | $ $ 13,700,000                    
Commissions discounts and other offering expenses | $ $ 1,300,000                    
Stock issuable upon warrants (in shares)       12,427,387 12,427,387            
Proceeds from the exercise of warrants | $         $ 8,900,000            
October 2020 Offering | Common Stock                      
Class of Stock [Line Items]                      
Number of shares issued in transaction 19,003,510                    
October 2020 Offering | Common stock warrants                      
Class of Stock [Line Items]                      
Number of shares authorized to be repurchased 1,829,812                    
Closing sale price (in usd per share) | $ / shares $ 0.72                    
October 2020 Offering | Pre-Funded Warrant                      
Class of Stock [Line Items]                      
Closing sale price (in usd per share) | $ / shares $ 0.719                    
Common Stock Public Offering                      
Class of Stock [Line Items]                      
Exercise price (in usd per share) | $ / shares   $ 1.25   $ 1.25 $ 1.25 $ 1.25          
Sale of stock, expiration term   5 years                  
Stock issuable upon warrants (in shares)       17,500 17,500            
Proceeds from the exercise of warrants | $         $ 22,000            
Common stock, shares issued   14,790,133       14,790,133          
Net proceeds from common stock public offering | $   $ 18,700,000                  
Underwriting commissions, discounts, and other offering expenses | $   $ 1,400,000                  
Common Stock Public Offering | Pre-Funded Warrant                      
Class of Stock [Line Items]                      
Stock issuable upon warrants (in shares)   2,709,867       2,709,867          
Public offering price (in usd per share) | $ / shares   $ 1.15       $ 1.15          
Common Stock Public Offering | Accompanying Common Warrant                      
Class of Stock [Line Items]                      
Stock issuable upon warrants (in shares)   17,500,000       17,500,000          
Public offering price (in usd per share) | $ / shares   $ 1.149       $ 1.149          
2020 At Market Issuance Sales Agreement                      
Class of Stock [Line Items]                      
Consideration received on transaction | $       $ 6,000 $ 1,600,000            
Aggregate offering price | $                     $ 8,000,000.0
Sale of stock, weighted average price per share (in usd per share) | $ / shares       $ 1.16 $ 1.55            
Sale of stock additional shares authorized amount | $       $ 2,600,000 $ 2,600,000            
2020 At Market Issuance Sales Agreement | Common Stock                      
Class of Stock [Line Items]                      
Number of shares issued in transaction       5,500 1,089,048            
2021 At Market Issuance Sales Agreement                      
Class of Stock [Line Items]                      
Closing sale price (in usd per share) | $ / shares       $ 0.89 $ 0.89            
Consideration received on transaction | $         $ 3,400,000            
Aggregate offering price | $               $ 50,000,000.0      
Sale of stock, percentage of commission         0.03            
Sale of stock additional shares authorized amount | $       $ 46,500,000 $ 46,500,000            
2021 At Market Issuance Sales Agreement | Common Stock                      
Class of Stock [Line Items]                      
Number of shares issued in transaction       3,963,476 3,963,476            
Private Placement Offerings                      
Class of Stock [Line Items]                      
Common stock, shares issued     950,000                
Aggregate gross purchase price | $     $ 2,000,000.0                
Private Placement Offerings | Series A                      
Class of Stock [Line Items]                      
Exercise price (in usd per share) | $ / shares     $ 0.01                
Stock issuable upon warrants (in shares)     606,420                
Private Placement Offerings | Series B                      
Class of Stock [Line Items]                      
Exercise price (in usd per share) | $ / shares     $ 1.16                
Stock issuable upon warrants (in shares)     1,556,420                
Purchase Agreement                      
Class of Stock [Line Items]                      
Sale of stock additional shares authorized amount | $       $ 27,300,000 $ 27,300,000            
Purchase Agreement | Lincoln Park                      
Class of Stock [Line Items]                      
Number of shares issued in transaction       800,000 800,000            
Closing sale price (in usd per share) | $ / shares     $ 3.00 $ 0.81 $ 0.81            
Consideration received on transaction | $       $ 600,000 $ 600,000            
Maximum shares allowed to be purchased     100,000                
Maximum share increase amount     125,000                
Regular Purchase | Lincoln Park                      
Class of Stock [Line Items]                      
Closing sale price (in usd per share) | $ / shares     $ 5.00                
Maximum share increase amount     150,000