v3.26.3
Debt - Schedule of Debt Instruments and their Changes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Convertible Loans Payable [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning $ 8,162 $ 6,977 $ 7,877 $ 7,877
Issuance of debt 1,300 1,500   11,000    
Debt repayments (765) (195) (610)        
Change in fair value (6,038) 3,910 555 3,969    
Debt extinguishment 6,407              
Conversion of debt to equity (7,204) (3,460) (1,260)        
Debt forgiven            
Stated interest          
Amortization of debt discount and issuance costs            
Accrued stated interest          
Debt assumed in connection with reverse recapitalization              
Balance at Ending 2,627 8,162 6,977 14,359 $ 2,627 14,359
Accounting basis              Fair value option  
Conversion price(s) per share, as affected by the Reverse Stock Splits              various  
Tasly Convertible Debt - Related Party [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning 2,629 2,532 2,290 2,543 2,390 2,234 $ 2,290 2,234
Issuance of debt      
Debt repayments        
Change in fair value 98 97 242 (145) (38) 156    
Debt extinguishment              
Conversion of debt to equity        
Debt forgiven            
Stated interest       (191) 191    
Amortization of debt discount and issuance costs            
Accrued stated interest          
Debt assumed in connection with reverse recapitalization              
Balance at Ending $ 2,727 2,629 2,532 2,207 2,543 2,390 $ 2,727 2,207
Accounting basis              Fair value option  
Interest rate 24.00%           24.00%  
Conversion price(s) per share, as affected by the Reverse Stock Splits             14,400.00  
Maturity             Mar. 31, 2024  
Convertible Promissory Note - Related Party [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning $ 2,114 1,870 1,870 $ 1,870
Issuance of debt      
Debt repayments        
Change in fair value (1,411) 244 (242)    
Debt extinguishment 1,479              
Conversion of debt to equity (1,166)        
Debt forgiven            
Stated interest          
Amortization of debt discount and issuance costs            
Accrued stated interest          
Debt assumed in connection with reverse recapitalization       2,162        
Balance at Ending $ 1,016 2,114 1,870 1,920 $ 1,016 1,920
Accounting basis              Fair value option  
Interest rate            
Maturity             Dec. 31, 2026  
Convertible senior notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning $ 45 43 42 27,895 26,589 25,268 $ 42 25,268
Issuance of debt   100 700 750    
Debt repayments (443)        
Change in fair value    
Debt extinguishment 27              
Conversion of debt to equity (18) (27,279)        
Debt forgiven            
Stated interest       81 604 572    
Amortization of debt discount and issuance costs         2 (1)    
Accrued stated interest 2 1          
Debt assumed in connection with reverse recapitalization              
Balance at Ending 45 43 154 27,895 26,589 154
Accounting basis              Effective interest method  
Conversion price(s) per share, as affected by the Reverse Stock Splits             3,750.00  
Maturity             Jul. 11, 2025  
Promissory Notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning 1,054 1,040 1,049 940 925 910 $ 1,049 910
Issuance of debt   100    
Debt repayments (24)        
Change in fair value    
Debt extinguishment 413              
Conversion of debt to equity (254)        
Debt forgiven            
Stated interest       5 15 15    
Amortization of debt discount and issuance costs            
Accrued stated interest 12 14 15          
Debt assumed in connection with reverse recapitalization              
Balance at Ending 399 1,054 1,040 1,045 940 925 $ 399 1,045
Accounting basis              Simple interest method  
Conversion price(s) per share, as affected by the Reverse Stock Splits              
PPP Loan [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning 1,390 1,383 1,379 1,376 $ 1,390 1,376
Issuance of debt      
Debt repayments        
Change in fair value    
Debt extinguishment              
Conversion of debt to equity        
Debt forgiven   (1,392)          
Stated interest       3 4 3    
Amortization of debt discount and issuance costs            
Accrued stated interest 2          
Debt assumed in connection with reverse recapitalization              
Balance at Ending 1,386 1,383 1,379 1,386
Accounting basis              Compounding Interest  
Interest rate 1.00%           1.00%  
Conversion price(s) per share, as affected by the Reverse Stock Splits              
Maturity              
D&O Insurance Financing [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning 75 297       $ 297  
Issuance of debt            
Debt repayments (75) (222)          
Change in fair value          
Debt extinguishment              
Conversion of debt to equity          
Debt forgiven            
Accrued stated interest          
Balance at Ending $ 75        
Accounting basis             Simple interest method  
Interest rate 7.00%           7.00%  
Conversion price(s) per share, as affected by the Reverse Stock Splits              
Maturity             Jul. 10, 2026  
Junior Convertible Notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Balance at Beginning       19,533 18,965 18,419   18,419
Issuance of debt          
Debt repayments              
Change in fair value          
Conversion of debt to equity       (19,612)        
Stated interest       79 553 545    
Amortization of debt discount and issuance costs         15 1    
Debt assumed in connection with reverse recapitalization              
Balance at Ending       $ 19,533 $ 18,965  
Minimum [Member] | Convertible Loans Payable [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 7.00%           7.00%  
Minimum [Member] | Convertible Promissory Note - Related Party [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Conversion price(s) per share, as affected by the Reverse Stock Splits             4.28  
Minimum [Member] | Convertible senior notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 0.00%           0.00%  
Conversion price(s) per share, as affected by the Reverse Stock Splits             16,650.00  
Minimum [Member] | Promissory Notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 0.00%           0.00%  
Maximum [Member] | Convertible Loans Payable [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 12.00%           12.00%  
Maximum [Member] | Convertible senior notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 12.00%           12.00%  
Conversion price(s) per share, as affected by the Reverse Stock Splits             30,000.00  
Maximum [Member] | Promissory Notes [Member]                
Schedule of Debt Instruments and their Changes [Line Items]                
Interest rate 12.00%           12.00%