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Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
2026 Convertible Notes
Private Placement
Common Stock
Common Stock
2026 Convertible Notes
Common Stock
Private Placement
Preferred Stock
Private Placement
Preferred Stock
Series A Preferred Stock
Preferred Stock
Series A Preferred Stock
Private Placement
Additional Paid-In Capital
Additional Paid-In Capital
2026 Convertible Notes
Additional Paid-In Capital
Private Placement
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Balance at Dec. 31, 2023 $ (33,973)     $ 1,503           $ 1,870,525     $ 13 $ (1,906,014)
Balance (in shares) at Dec. 31, 2023       150,285                    
Issuance of common stock under equity incentive plan 11     $ 1           10        
Issuance of common stock under equity incentive plan (in shares)       93                    
Stock-based compensation expense 3,375                 3,375        
Net Income (Loss) (3,160)                         (3,160)
Unrealized gain (loss) on short-term investments (19)                       (19)  
Comprehensive loss (3,179)                          
Balance at Mar. 31, 2024 (33,766)     $ 1,504           1,873,910     (6) (1,909,174)
Balance (in shares) at Mar. 31, 2024       150,378                    
Balance at Dec. 31, 2023 (33,973)     $ 1,503           1,870,525     13 (1,906,014)
Balance (in shares) at Dec. 31, 2023       150,285                    
Net Income (Loss) (17,243)                          
Unrealized gain (loss) on short-term investments 27                          
Comprehensive loss (17,216)                          
Balance at Sep. 30, 2024 (40,005)     $ 1,517           1,881,695     40 (1,923,257)
Balance (in shares) at Sep. 30, 2024       151,702                    
Balance at Mar. 31, 2024 (33,766)     $ 1,504           1,873,910     (6) (1,909,174)
Balance (in shares) at Mar. 31, 2024       150,378                    
Issuance of common stock under equity incentive plan 318     $ 9           309        
Issuance of common stock under equity incentive plan (in shares)       872                    
Issuance of common stock under the employee stock purchase plan 175     $ 3           172        
Issuance of common stock under the employee stock purchase plan (in shares)       328                    
Stock-based compensation expense 4,570                 4,570        
Net Income (Loss) (9,235)                         (9,235)
Unrealized gain (loss) on short-term investments (2)                       (2)  
Comprehensive loss (9,237)                          
Balance at Jun. 30, 2024 (37,940)     $ 1,516           1,878,961     (8) (1,918,409)
Balance (in shares) at Jun. 30, 2024       151,578                    
Issuance of common stock under equity incentive plan 13     $ 1           12        
Issuance of common stock under equity incentive plan (in shares)       124                    
Stock-based compensation expense 2,722                 2,722        
Net Income (Loss) (4,848)                         (4,848)
Unrealized gain (loss) on short-term investments 48                       48  
Comprehensive loss (4,800)                          
Balance at Sep. 30, 2024 (40,005)     $ 1,517           1,881,695     40 (1,923,257)
Balance (in shares) at Sep. 30, 2024       151,702                    
Balance at Dec. 31, 2024 (33,651)     $ 1,521           1,884,409     13 (1,919,594)
Balance (in shares) at Dec. 31, 2024       152,128                    
Issuance of common stock under equity incentive plan 64     $ 3           61        
Issuance of common stock under equity incentive plan (in shares)       299                    
Stock-based compensation expense 2,511                 2,511        
Net Income (Loss) 2,635                         2,635
Unrealized gain (loss) on short-term investments (12)                       (12)  
Comprehensive loss 2,623                          
Balance at Mar. 31, 2025 (28,453)     $ 1,524           1,886,981     (1) (1,916,959)
Balance (in shares) at Mar. 31, 2025       152,427                    
Balance at Dec. 31, 2024 (33,651)     $ 1,521           1,884,409     13 (1,919,594)
Balance (in shares) at Dec. 31, 2024       152,128                    
Net Income (Loss) (17,241)                          
Unrealized gain (loss) on short-term investments (13)                          
Comprehensive loss (17,254)                          
Balance at Sep. 30, 2025 14,885     $ 1,833       $ 7,862   1,942,025       (1,936,835)
Balance (in shares) at Sep. 30, 2025       183,324       524            
Balance at Mar. 31, 2025 (28,453)     $ 1,524           1,886,981     (1) (1,916,959)
Balance (in shares) at Mar. 31, 2025       152,427                    
Issuance of common stock under equity incentive plan 194     $ 5           189        
Issuance of common stock under equity incentive plan (in shares)       438                    
Issuance of common stock under the employee stock purchase plan 587     $ 4           583        
Issuance of common stock under the employee stock purchase plan (in shares)       388                    
Stock-based compensation expense 2,797                 2,797        
Net Income (Loss) (2,381)                         (2,381)
Unrealized gain (loss) on short-term investments (2)                       (2)  
Comprehensive loss (2,383)                          
Balance at Jun. 30, 2025 (27,258)     $ 1,533           1,890,550     (1) (1,919,340)
Balance (in shares) at Jun. 30, 2025       153,253                    
Issuance of common stock under equity incentive plan (51)     $ 1           (52)        
Issuance of common stock under equity incentive plan (in shares)       179                    
Issuance of common stock   $ 30,667 $ 18,307   $ 167 $ 132         $ 30,500 $ 18,175    
Issuance of common stock (in shares)         16,667 13,225                
Issuance of convertible stock             $ 7,862   $ 7,862          
Issuance of convertible stock (in shares)                 524          
Stock-based compensation expense 2,852                 2,852        
Net Income (Loss) (17,495)                         (17,495)
Unrealized gain (loss) on short-term investments 1                       $ 1  
Comprehensive loss (17,494)                          
Balance at Sep. 30, 2025 $ 14,885     $ 1,833       $ 7,862   $ 1,942,025       $ (1,936,835)
Balance (in shares) at Sep. 30, 2025       183,324       524