Quarterly report pursuant to Section 13 or 15(d)

Convertible Redeemable Preferred Stock and Stockholders' Equity (Details)

v3.24.1.1.u2
Convertible Redeemable Preferred Stock and Stockholders' Equity (Details) - USD ($)
 3 Months Ended 12 Months Ended
Feb. 13, 2024
Dec. 06, 2023
Oct. 16, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Convertible Preferred Stock and Stockholders' Equity            
Proceeds from the exercise of prefunded warrants and common stock warrants       $ 714,000 $ 32,000  
Change in fair value of warrant liabilities       $ (8,129,000) $ (5,604,000)  
Number of shares outstanding       0   38,335
Issuance of common stock in connection with warrant exercise (in shares)         5,705  
Proceeds from exercise of warrants       $ 714,000 $ 32,000  
Issuance of common stock in connection with warrant exercise         $ 8,202,000  
Repurchase price $ 6,266,000          
Series B preferred stock            
Convertible Preferred Stock and Stockholders' Equity            
Convertible note warrant       587,000    
Warrant liabilities       587,000    
Issuance of common stock in connection with warrant exercise       $ 1,634,000    
Number of warrants repurchased 81,315          
Remaining fair value of warrant liability adjusted against additional paid-in-capital $ 824,000          
New Common Stock Warrants            
Convertible Preferred Stock and Stockholders' Equity            
Number of shares called by each warrant       2    
Warrants exercise price       $ 22.23    
Issuance costs       $ 44,000    
Issuance of common stock in connection with warrant exercise       $ 1,188,000    
Series B Preferred Stock            
Convertible Preferred Stock and Stockholders' Equity            
Number of shares issued upon conversion           177,282
Redemption price per share       $ 100    
Price per share       $ 35.72    
Change in fair value of warrant liabilities       $ 554,000    
Number of shares converted       5,000   110,278
Issuance of common stock in connection with notes payable (in shares)       8,038    
Unamortized discount       $ 269,000   $ 6,063,000
Unamortized discounts on warrants repurchase $ 5,381,000          
Amortization and accretion of discounts       192,000   297,000
Deemed dividends           $ 6,360,000
Number of shares outstanding           38,335
Aggregate amount of redemption       $ 5,842,000   $ 3,833,500
Number of preferred share received per warrant exercised       1    
Number of common share warrant received per warrant exercised       1    
Issuance of common stock in connection with warrant exercise       $ 446,000    
Number of shares repurchased 62,657          
Series B Preferred Stock | Preferred Stock Warrants liability            
Convertible Preferred Stock and Stockholders' Equity            
Convertible note warrant           1,628,000
Warrant liabilities           1,628,000
Series B Preferred Stock | Common Stock Warrants liability            
Convertible Preferred Stock and Stockholders' Equity            
Convertible note warrant           3,322,000
Warrant liabilities           $ 3,322,000
Series B Preferred Stock | Series B preferred stock            
Convertible Preferred Stock and Stockholders' Equity            
Warrants exercise price       $ 35.72    
Proceeds from the exercise of prefunded warrants and common stock warrants       $ 1,047,000    
Issuance costs       $ 61,000    
Issuance of common stock in connection with warrant exercise (in shares)       29,332    
Proceeds from exercise of warrants       $ 1,047,000    
Additional discounts in connection with the issuance       $ 1,188,000    
October Public Offering            
Convertible Preferred Stock and Stockholders' Equity            
Number of shares called by each warrant     2      
October Public Offering | Series B preferred stock            
Convertible Preferred Stock and Stockholders' Equity            
Number of shares called by each warrant     1      
October Public Offering | Series B Units            
Convertible Preferred Stock and Stockholders' Equity            
Issuance of common stock and warrants, net of offering costs (in shares)     87,000      
Proceeds from issuance of Series B preferred stock, net of issuance costs     $ 4,785,000      
Cash fees paid     $ 830,000      
October Public Offering | Series B Preferred Stock            
Convertible Preferred Stock and Stockholders' Equity            
Number of common shares per unit     1      
Term of conversion of temporary equity     2 years      
Stated value per share     $ 100      
Conversion price     $ 62.205      
Number of shares issued upon conversion     1      
Redemption price per share     $ 100     $ 100
October Public Offering | Series B Preferred Stock | Series B preferred stock            
Convertible Preferred Stock and Stockholders' Equity            
Number of common shares per unit     1      
Dividend rate     20.00%      
Price per share     $ 55      
Issuance costs           $ 429,000
Inducement Agreement | Series B Preferred Stock            
Convertible Preferred Stock and Stockholders' Equity            
Beneficial conversion feature           196,000
Additional proceeds           569,000
Issuance costs           $ 146,000
Inducement Agreement | Series B Preferred Stock | Series B preferred stock            
Convertible Preferred Stock and Stockholders' Equity            
Warrants exercise price   $ 35.72       $ 35.72
Number of warrants exercised           61,613
Proceeds from the exercise of prefunded warrants and common stock warrants           $ 2,264,000
Additional proceeds           3,892,000
Proceeds from exercise of warrants           $ 2,264,000
Inducement Agreement | Series B Preferred Stock | New Common Stock Warrants            
Convertible Preferred Stock and Stockholders' Equity            
Number of shares called by each warrant   2        
Warrants exercise price   $ 22.23        
Issuance costs   $ 125,000        
Remaining warrants outstanding           61,613