XML 40 R30.htm IDEA: XBRL DOCUMENT v3.22.1
STOCKHOLDERS’ EQUITY - Narrative (Details)
 3 Months Ended
Oct. 13, 2021
USD ($)
$ / shares
shares
Aug. 12, 2020
shares
Mar. 31, 2022
USD ($)
vote
$ / shares
shares
Mar. 31, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
May 31, 2018
$ / shares
shares
Class of Stock [Line Items]            
Sale of stock, proceeds | $ $ 36,600,000          
Preferred stock, shares authorized (in shares)     10,000,000   10,000,000  
Preferred stock, par value (in dollars per share) | $ / shares     $ 0.0001   $ 0.0001  
Common stock, shares authorized (in shares)     200,000,000   200,000,000  
Number of votes for each share held | vote     1      
Common Stock Warrant            
Class of Stock [Line Items]            
Warrants outstanding (in shares)     12,517,328   12,517,328  
Warrants, aggregate intrinsic value, outstanding | $     $ 0   $ 0  
Common Stock            
Class of Stock [Line Items]            
Offering price (in dollars per share) | $ / shares $ 1.55          
Issuance of common stock upon conversion of Series X Convertible Preferred Stock (in shares)   522,410        
Series X Convertible Preferred Stock            
Class of Stock [Line Items]            
Offering price (in dollars per share) | $ / shares $ 15.50          
Preferred stock, shares issued (in shares) 774,194   1,870,713   1,818,472  
Proceeds from right offerings | $ $ 38,500,000          
Preferred stock, shares authorized (in shares)     4,947,759   4,947,759 5,000,000
Preferred stock, par value (in dollars per share) | $ / shares     $ 0.0001   $ 0.0001 $ 0.0001
Issuance of common stock upon conversion of Series X Convertible Preferred Stock (in shares)   52,241        
Common stock issued for each preferred stock (in shares)     10      
Maximum ownership following conversion     9.99%      
Weighted Average | Common Stock Warrant            
Class of Stock [Line Items]            
Exercise price of warrant (in dollars per share) | $ / shares     $ 6.82   $ 6.82  
Controlled Equity Sales Agreement, Cantor Fitzgerald and Company            
Class of Stock [Line Items]            
Shares sold (in shares)     644,265 3,327,706    
Net proceeds | $     $ 500,000 $ 8,600,000    
Consideration remaining on transaction | $     $ 48,000,000      
Public Stock Offering | Common Stock            
Class of Stock [Line Items]            
Shares sold (in shares) 17,064,511          
Over-Allotment Option | Common Stock            
Class of Stock [Line Items]            
Shares sold (in shares) 2,225,805