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Stockholders' Deficit - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2025
Mar. 31, 2025
Oct. 31, 2024
Feb. 29, 2024
Sep. 30, 2025
Sep. 30, 2025
May 31, 2025
Apr. 30, 2025
Dec. 31, 2024
Class of Stock [Line Items]                  
Common stock authorized (in shares)         68,343,750 68,343,750 68,343,750 34,171,875 34,171,875
Private Placement                  
Class of Stock [Line Items]                  
Unregistered warrants issued (in shares) 3,076,921 8,316,882              
Exercise price of warrants (in dollars per share) $ 2.15 $ 2.41              
Class of warrant or right, expiration period 5 years 5 years              
Sale of equity, price per share (in dollars per share) $ 2.275 $ 2.41 $ 5.045            
Aggregate net proceeds from equity offering $ 6.1 $ 8.8 $ 10.8            
Private Placement | Unregistered Warrants                  
Class of Stock [Line Items]                  
Unregistered warrants issued (in shares)     2,398,414            
Exercise price of warrants (in dollars per share)     $ 4.92            
Class of warrant or right, expiration period     5 years            
Private Placement | Pre-Funded Unregistered Warrants                  
Class of Stock [Line Items]                  
Unregistered warrants issued (in shares) 1,538,461 2,184,009              
Private Placement | Pre Funded Warrants                  
Class of Stock [Line Items]                  
Exercise price of warrants (in dollars per share) $ 0.01       $ 0.01 $ 0.01      
Warrants, fair value $ 1.8 $ 2.4              
Exercise of warrants, number of shares issued (in shares)         487,000 709,255      
Private Placement | Common Stock                  
Class of Stock [Line Items]                  
Number of shares sold (in shares) 1,538,460 1,974,432 2,398,414            
Purchase price share (in shares) 1 1 1            
October 2024 Offerings                  
Class of Stock [Line Items]                  
Common stock, fair value     $ 6.0            
Warrants, fair value     $ 4.8            
March 2025 Offerings                  
Class of Stock [Line Items]                  
Purchase price share (in shares)   1              
Common stock, fair value $ 1.8 $ 2.2              
Warrants, fair value $ 2.5 $ 4.2              
Registered Direct Offering                  
Class of Stock [Line Items]                  
Class of warrant or right, purchase price (in dollars per share) $ 2.265 $ 2.40              
July 2025 Offerings                  
Class of Stock [Line Items]                  
Purchase price share (in shares) 1                
Cantor Fitzgerald & Co | Common Stock                  
Class of Stock [Line Items]                  
Sale of stock, maximum authorized amount       $ 100.0          
Cantor Fitzgerald & Co | Common Stock | Private Placement                  
Class of Stock [Line Items]                  
Compensation fee       3.00%          
Number of shares sold (in shares)           0      
Sale of stock remaining authorized amount         $ 98.8 $ 98.8      
Sale of stock, maximum public float         $ 75.0 $ 75.0      
Stock sale agreement, maximum percentage of public float         33.00% 33.00%      
Sale of stock, sale restriction period           12 months