Redeemable Convertible Preferred Stock - Summary of Preferred Stock Is Summarized (Details) - USD ($) |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 215,060,316 | 215,060,316 | 215,060,316 |
| Total Shares Issued and Outstanding | 207,952,902 | 215,038,192 | 215,038,192 |
| Carrying Value | $ 330,028,000 | $ 338,028,000 | $ 338,028,000 |
| Liquidation Preference | $ 329,001,000 | $ 337,001,000 | $ 337,001,000 |
| Common Shares Issuable Upon Conversion | 207,952,902 | 215,038,192 | 215,038,192 |
| Series A1 Preferred Stock [Member] | |||
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 33,222,339 | 33,222,339 | 33,222,339 |
| Total Shares Issued and Outstanding | 26,114,925 | 33,200,215 | 33,200,215 |
| Carrying Value | $ 29,486,000 | $ 37,486,000 | $ 37,486,000 |
| Liquidation Preference | $ 29,486,000 | $ 37,486,000 | $ 37,486,000 |
| Common Shares Issuable Upon Conversion | 26,114,925 | 33,200,215 | 33,200,215 |
| Series A2 Preferred Stock [Member] | |||
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 14,936,323 | 14,936,323 | 14,936,323 |
| Total Shares Issued and Outstanding | 14,936,323 | 14,936,323 | 14,936,323 |
| Carrying Value | $ 16,807,000 | $ 16,807,000 | $ 16,807,000 |
| Liquidation Preference | $ 14,936,000 | $ 14,936,000 | $ 14,936,000 |
| Common Shares Issuable Upon Conversion | 14,936,323 | 14,936,323 | 14,936,323 |
| Series A3 Preferred Stock [Member] | |||
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 6,146,592 | 6,146,592 | 6,146,592 |
| Total Shares Issued and Outstanding | 6,146,592 | 6,146,592 | 6,146,592 |
| Carrying Value | $ 9,035,000 | $ 9,035,000 | $ 9,035,000 |
| Liquidation Preference | $ 9,035,000 | $ 9,035,000 | $ 9,035,000 |
| Common Shares Issuable Upon Conversion | 6,146,592 | 6,146,592 | 6,146,592 |
| Series B Preferred Stock [Member] | |||
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 76,187,917 | 76,187,917 | 76,187,917 |
| Total Shares Issued and Outstanding | 76,187,917 | 76,187,917 | 76,187,917 |
| Carrying Value | $ 114,732,000 | $ 114,732,000 | $ 114,732,000 |
| Liquidation Preference | $ 115,044,000 | $ 115,044,000 | $ 115,044,000 |
| Common Shares Issuable Upon Conversion | 76,187,917 | 76,187,917 | 76,187,917 |
| Series C Preferred Stock [Member] | |||
| Preferred Stock Summarized [Line Items] | |||
| Total Shares Authorized | 84,567,145 | 84,567,145 | 84,567,145 |
| Total Shares Issued and Outstanding | 84,567,145 | 84,567,145 | 84,567,145 |
| Carrying Value | $ 159,968,000 | $ 159,968,000 | $ 159,968,000 |
| Liquidation Preference | $ 160,500,000 | $ 160,500,000 | $ 160,500,000 |
| Common Shares Issuable Upon Conversion | 84,567,145 | 84,567,145 | 84,567,145 |