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Capital Stock and Warrants - Convertible preferred stock authorized and issued and outstanding (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Capital Stock and Warrants    
Shares Authorized 43,405,324 43,405,324
Shares Issued and Outstanding 9,473,084  
Proceeds Net of Issuance Costs $ 34,015  
Aggregate Liquidation Preference $ 35,174 $ 35,361
Series A Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 8,936,015  
Shares Issued and Outstanding 1,418,381  
Proceeds Net of Issuance Costs $ 614  
Aggregate Liquidation Preference $ 1,267  
Series B Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 4,707,501  
Shares Issued and Outstanding 3,498,859  
Proceeds Net of Issuance Costs $ 7,098  
Aggregate Liquidation Preference $ 7,138  
Series m Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 6,666,666  
Shares Issued and Outstanding 1,775,586  
Proceeds Net of Issuance Costs $ 4,611  
Aggregate Liquidation Preference $ 5,327  
Series m-1 Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 333,334  
Series m-2 Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 1,660,756  
Shares Issued and Outstanding 160,000  
Proceeds Net of Issuance Costs $ 480  
Aggregate Liquidation Preference $ 480  
Series m-3 Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 3,490,658  
Series m-4 Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 4,502,061  
Series S Preferred Stock    
Capital Stock and Warrants    
Shares Authorized 13,108,333  
Shares Issued and Outstanding 2,620,258  
Proceeds Net of Issuance Costs $ 21,212  
Aggregate Liquidation Preference $ 20,962