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Liquidity and Capital Resources (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 5 Months Ended 9 Months Ended 12 Months Ended
Oct. 24, 2024
Jan. 02, 2024
Aug. 10, 2023
Aug. 07, 2023
Mar. 13, 2023
Aug. 31, 2023
Nov. 30, 2021
Sep. 30, 2024
Sep. 30, 2023
Jan. 27, 2021
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Sep. 08, 2023
Mar. 31, 2023
Apr. 30, 2022
Aug. 09, 2020
Jul. 31, 2019
Net loss               $ (23,976) $ (24,103)   $ (63,140) $ (43,202) $ (60,400) $ 142,100          
Gross profit (loss)               (4,051) 1,172   (3,418) 2,002              
Accumulated deficit               (932,398)     (932,398)   $ (869,258)            
Cash, cash equivalents and marketable securities               $ 74,500     $ 74,500                
Common stock, par value per share (in dollars per share)               $ 0.001     $ 0.001   $ 0.001            
Issuance of common stock, net of issuance costs               $ 3,667 $ 118   $ 3,667 $ 7,376              
Subsequent Event                                      
Common stock, par value per share (in dollars per share) $ 0.001                                    
Shares issued (in shares) 45,714,286                                    
PHC Purchase Warrant                                      
Beneficial ownership by PHC (%)         15.00%                            
Term Loan Facility                                      
Aggregate principal amount               35,000     35,000   $ 25,000            
Tranche 2 Loan                                      
Amount received from loan funding   $ 10,000                                  
PHC Notes                                      
Interest rate (as a percent)                                 8.00% 9.50%  
Aggregate principal amount                               $ 35,000   $ 35,000  
Common stock, par value per share (in dollars per share)                                   $ 0.001  
Conversion price (in dollars per share)                                   $ 0.53  
2025 Notes                                      
Interest rate (as a percent)     5.25%                                
Aggregate principal amount     $ 30,800         $ 20,399   $ 6,800 20,399   20,399           $ 82,000
Converted debt amount     $ 7,500                                
Debt converted, Shares issued     35,100,000             5,152,259                  
Conversion price (in dollars per share)                                     $ 1.32
Ascensia | PHC Notes                                      
Aggregate principal amount         $ 35,000                         $ 35,000  
PHC Exchange Warrant                                      
Number of shares of common stock called by warrant         68,525,311                            
Exercise price of warrant (in dollars per share)         $ 0.001                            
PHC Purchase Warrant                                      
Number of shares of common stock called by warrant         15,425,750                            
Exercise price of warrant (in dollars per share)         $ 0.001                            
Purchase price of warrant (in dollars per share)         $ 0.97                            
Proceeds from issuance of warrants         $ 15,000                            
Convertible Preferred Equity                                      
Amount of possible additional debt principal amount                                   $ 15,000  
Hercules | Term Loan Facility                                      
Maximum amount available under facility                             $ 50,000        
Interest rate (as a percent)                             9.90%        
Hercules | Term Loan Facility | Maximum                                      
Maximum amount available under facility                             $ 50,000        
Hercules | Tranche 1 Loan                                      
Maximum amount available under facility                             25,000        
Hercules | Tranche 2 Loan                                      
Maximum amount available under facility                             10,000        
Amount received from loan funding   $ 10,000                                  
Hercules | Tranche 3 Loan                                      
Maximum amount available under facility                             $ 15,000        
Open Market Sale Agreement                                      
Proceeds from issuance of stock                         $ 7,400            
Shares issued (in shares)                         9,944,663            
Open Market Sale Agreement | Jefferies LLC                                      
Issuance of common stock, net of issuance costs       $ 106,600                 $ 7,400            
Shares issued (in shares)                         9,944,663            
Open Market Sale Agreement | Jefferies LLC | Maximum                                      
Issuance of common stock, net of issuance costs             $ 150,000                        
Percentage of commission on proceeds from common stock             3.00%                        
Equity Distribution Agreement | Goldman Sachs & Co. LLC                                      
Proceeds from issuance of stock                     4,200                
Issuance of common stock, net of issuance costs $ 55,000                   $ 4,200                
Shares issued (in shares)                     10,766,983                
Equity Distribution Agreement | Goldman Sachs & Co. LLC | Subsequent Event                                      
Issuance of common stock, net of issuance costs 55,000                                    
Equity Distribution Agreement | Goldman Sachs & Co. LLC | Maximum                                      
Issuance of common stock, net of issuance costs $ 55,000         $ 106,600                          
Percentage of commission on proceeds from common stock           3.00%