Quarterly report pursuant to Section 13 or 15(d)

Preferred Stock (Details)

v3.23.1
Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 22, 2022
Mar. 22, 2022
Sep. 13, 2021
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Jan. 14, 2019
Apr. 20, 2018
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)       5,000,000 5,000,000        
Preferred stock, par value (in usd per share)       $ 0.001 $ 0.001        
Net proceeds from issuance of preferred stock and warrants       $ 0   $ 46,906      
Series 4 Convertible Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)       10,415 10,415       10,415
Preferred stock, par value (in usd per share)                 $ 1,000
Series preferred stock conversion value (in usd per share)                 $ 16,740
Preferred stock, shares outstanding (in shares)       1 1        
Series 5 Convertible Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)       12,000 12,000     12,000  
Preferred stock, par value (in usd per share)               $ 1,000  
Series preferred stock conversion value (in usd per share)               $ 11,238.75  
Preferred stock, shares outstanding (in shares)       126 126        
Series 7 Convertible Preferred Stock                  
Class of Stock [Line Items]                  
Mezzanine equity, convertible preferred stock, shares authorized (in shares)     58,750            
Net proceeds from issuance of preferred stock and warrants     $ 50,600            
Preferred redeemed for cash (in shares)   49,250              
Preferred shares redeemed, cash consideration   $ 49,300              
Mezzanine equity, convertible preferred stock, shares outstanding (in shares)       0   0 49,250    
Series 7 Convertible Preferred Stock | Registered Direct Offering                  
Class of Stock [Line Items]                  
Subscription price (in usd per share)     $ 920            
Original issuance discount percentage     8.00%            
Aggregate subscription value     $ 54,100            
Series 7 Convertible Preferred Stock | Registered Direct Offering | Warrants                  
Class of Stock [Line Items]                  
Number of shares sold under offering (in shares)     626,667            
Series 8 Convertible Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares) 53,197.7234 53,197.7234              
Preferred stock, shares outstanding (in shares)       0          
Net proceeds from issuance of preferred stock and warrants $ 46,900                
Preferred redeemed for cash (in shares)         53,197.72        
Preferred shares redeemed, cash consideration         $ 53,200        
Mezzanine equity, convertible preferred stock, shares outstanding (in shares)           53,198 0    
Series 8 Convertible Preferred Stock | Registered Direct Offering                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares) 53,197.7234 53,197.7234              
Preferred stock, par value (in usd per share) $ 0.001 $ 0.001              
Number of shares sold under offering (in shares) 1,503,726                
Subscription price (in usd per share) $ 940 $ 940              
Original issuance discount percentage 6.00% 6.00%              
Aggregate subscription value $ 50,000 $ 50,000