Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

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Subsequent Events (Details)
 1 Months Ended 3 Months Ended
Dec. 30, 2022
USD ($)
$ / shares
shares
May 31, 2024
USD ($)
$ / shares
shares
Apr. 30, 2024
USD ($)
$ / shares
shares
Jan. 31, 2024
USD ($)
$ / shares
shares
Mar. 31, 2024
USD ($)
$ / shares
Mar. 31, 2023
USD ($)
Jan. 09, 2024
$ / shares
Dec. 31, 2023
$ / shares
Oct. 11, 2022
$ / shares
Subsequent Events                  
Stock offering, number of shares issued | shares 4,900,000                
Sale of National Holding's stock, proceeds received | $ $ 150,000,000.0                
Common Stock, par value $ 0.0001       $ 0.001     $ 0.001  
Proceeds from Warrant Exercises | $         $ 30,000 $ 0      
Avenue                  
Subsequent Events                  
Exercise price of warrants                 $ 116.25
Avenue | Series A Warrants                  
Subsequent Events                  
Stock offering, price per share             $ 22.545    
Avenue | Series B Warrants                  
Subsequent Events                  
Stock offering, price per share             $ 22.545    
Direct offering                  
Subsequent Events                  
Warrant expiration term       5 years          
Exercise price of warrants       $ 3.21          
Sale of National Holding's stock, proceeds received | $       $ 10,200,000          
Direct offering | Common Stock                  
Subsequent Events                  
Stock offering, number of shares issued | shares       3,303,305          
Unit Price Per Share       $ 3.33          
Direct offering | Checkpoint Common Stock Warrants                  
Subsequent Events                  
Sale of National Holding's stock, proceeds received | $       $ 12,800,000          
Direct offering | Checkpoint Common Stock Warrants | Common Stock                  
Subsequent Events                  
Stock offering, price per share       $ 1.805          
Sale of National Holding's stock, proceeds received | $       $ 1,275,000          
Direct offering | Checkpoint Common Stock Warrants | Common Stock Warrant                  
Subsequent Events                  
Warrant expiration term       5 years          
Exercise price of warrants       $ 1.68          
Direct offering | Checkpoint Common Stock Warrants | Pre funded warrants                  
Subsequent Events                  
Warrants issued | shares       6,481,233          
Number of shares called by warrants | shares       1          
Stock offering, price per share       $ 1.8049          
Exercise price of warrants       0.0001          
Direct offering | Checkpoint Common Stock Warrants | Placement Agent Warrants                  
Subsequent Events                  
Exercise price of warrants       $ 2.2563          
Direct offering | Maximum                  
Subsequent Events                  
Number of warrants to purchase shares | shares       3,303,305          
Direct offering | Maximum | Checkpoint Common Stock Warrants | Common Stock                  
Subsequent Events                  
Number of warrants to purchase shares | shares       7,756,233          
Direct offering | Maximum | Checkpoint Common Stock Warrants | Placement Agent Warrants                  
Subsequent Events                  
Number of warrants to purchase shares | shares       465,374          
Subsequent Events | Mustang                  
Subsequent Events                  
Reduced percentage in employee workforce     81.00%            
Subsequent Events | Avenue                  
Subsequent Events                  
Number of warrants to purchase shares | shares     689,680            
Exercise price of warrants     $ 6.20            
Reverse Stock Split ratio     0.013            
Common Stock, par value     $ 0.0001            
Subsequent Events | Avenue | Common Stock                  
Subsequent Events                  
Stock offering, price per share   $ 0.0001              
Total gross proceeds | $   $ 3,850,000              
Subsequent Events | Avenue | Unregistered warrants                  
Subsequent Events                  
Number of warrants to purchase shares | shares     1,379,360            
Stock offering, price per share     $ 0.125            
Exercise price of warrants     $ 6.20            
Total gross proceeds | $     $ 4,400,000            
Subsequent Events | Minimum | Avenue                  
Subsequent Events                  
Warrant expiration term     18 months            
Subsequent Events | Maximum | Avenue                  
Subsequent Events                  
Warrant expiration term     5 years            
Subsequent Events | Public Offering | Mustang                  
Subsequent Events                  
Number of warrants to purchase shares | shares   50,632,914              
Stock offering, price per share   $ 0.237              
Total gross proceeds | $   $ 4,000,000.0              
Exercise price of warrants   $ 0.237              
Proceeds from Warrant Exercises | $   $ 3,300,000              
Subsequent Events | Public Offering | Mustang | Common Stock                  
Subsequent Events                  
Stock offering, number of shares issued | shares   16,877,638              
Subsequent Events | Public Offering | Mustang | Series A One Warrants                  
Subsequent Events                  
Warrant expiration term   5 years              
Subsequent Events | Public Offering | Mustang | Series A Two Warrants                  
Subsequent Events                  
Warrant expiration term   24 months              
Subsequent Events | Public Offering | Mustang | Series A Three Warrants                  
Subsequent Events                  
Warrant expiration term   9 months              
Subsequent Events | Public Offering | Mustang | Amended Warrants                  
Subsequent Events                  
Number of warrants to purchase shares | shares   2,588,236              
Stock offering, price per share   $ 1.58              
Warrant expiration term   5 years              
Exercise price of warrants   $ 0.237