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Redeemable Convertible Preferred Stock Warrant Liabilities - Schedule of redeemable convertible preferred stock warrant liabilities (Details) - $ / shares | Sep. 30, 2025 | Dec. 31, 2024
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Redeemable Convertible Preferred Stock Warrant Liabilities [Line Items] |  |
Shares Underlying Warrants | 25,376 | 1,969
Series A Redeemable Convertible Preferred Stock [Member] | August 2028 [Member] |  |
Redeemable Convertible Preferred Stock Warrant Liabilities [Line Items] |  |
Shares Underlying Warrants |  | 486
Exercise Price Per Share |  | $ 0.001
Series A Redeemable Convertible Preferred Stock [Member] | December 2028 [Member] |  |
Redeemable Convertible Preferred Stock Warrant Liabilities [Line Items] |  |
Shares Underlying Warrants |  | 303
Exercise Price Per Share |  | $ 1.482
Series A Redeemable Convertible Preferred Stock [Member] | June 2031 [Member] |  |
Redeemable Convertible Preferred Stock Warrant Liabilities [Line Items] |  |
Shares Underlying Warrants |  | 540
Exercise Price Per Share |  | $ 1.482
Series B2 Redeemable Convertible Preferred Stock [Member] | September2032 [Member] |  |
Redeemable Convertible Preferred Stock Warrant Liabilities [Line Items] |  |
Shares Underlying Warrants |  | 640
Exercise Price Per Share |  | $ 2.344

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