v3.26.3
Net Loss Per Share Attributable to Common Stockholders - Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - shares
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities 16,670,546 22,474
Series A Non-Voting Convertible Preferred Stock    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities 14,708,215
Related Party Convertible Notes [Member]    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities [1] 289,796 268
Convertible Notes Payable [Member]    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities [2] 1,636,250 19,145
Warrants [Member]    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities 35,670 2,337
Options to Purchase Common Stock [Member]    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities 228 208
Earnout Shares [Member]    
Schedule of Diluted Net Loss Per Share Attributable to Common Stockholders [Line Items]    
Antidilutive securities [3] 387 516
[1] Includes the assumed issuance of 189 shares and 153 shares of common stock for the conversion of Tasly Convertible Notes at $14,400.00 per share as of September 30, 2026 and 2025, respectively;
[2] Includes the assumed issuance of 1,636,250 shares of common stock at the conversion price of $1.61 per share for the Ascent PIPE Notes, taking 95% of the lowest closing share price in the 10 trading days preceding September 30, 2026 and the assumed issuance of 19,145 shares of common stock at the conversion price of $750.00 per share for the Ascent PIPE Notes, based on the contractual floor price of $750.00 per share as of September 30, 2025;
[3] As of September 30, 2026, these earnout shares exclude 129 shares allocated to Milestone III as Milestone III expired as of December 31, 2025.