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Preferred Stock - Convertible Preferred Stock Rollforward (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance $ 164,006 $ 160,507 $ 160,507 $ 55,975
Issuances 39,968 3,499 3,499 104,532
Retirements / Conversions (203,974)      
Convertible preferred stock, ending balance   164,006 164,006 160,507
Series A-1        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 6,065 6,065 6,065  
Retirements / Conversions (6,065)      
Convertible preferred stock, ending balance   6,065 6,065 6,065
Series A-2        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 8,976 8,976 8,976  
Retirements / Conversions (8,976)      
Convertible preferred stock, ending balance   8,976 8,976 8,976
Series A-3        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 10,611 10,611 10,611  
Retirements / Conversions (10,611)      
Convertible preferred stock, ending balance   10,611 10,611 10,611
Series A-4        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 1,993 1,993 1,993  
Retirements / Conversions (1,993)      
Convertible preferred stock, ending balance   1,993 1,993 1,993
Series A-5        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 12,858 12,858 12,858  
Retirements / Conversions (12,858)      
Convertible preferred stock, ending balance   12,858 12,858 12,858
Series A-6        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 15,476 15,476 15,476  
Retirements / Conversions (15,476)      
Convertible preferred stock, ending balance   15,476 15,476 15,476
Series B        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 84,528 84,528 84,528  
Issuances 109      
Retirements / Conversions (84,637)      
Convertible preferred stock, ending balance   84,528 84,528 84,528
Series B-1        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Convertible preferred stock, beginning balance 23,499 20,000 20,000  
Issuances 1 3,499    
Retirements / Conversions (23,500)      
Convertible preferred stock, ending balance   $ 23,499 $ 23,499 $ 20,000
Series B-3        
Increase (Decrease) in Temporary Equity [Roll Forward]        
Issuances 39,858      
Retirements / Conversions $ (39,858)