Net Loss Per Share - Potentially Dilutive Shares (Details) - shares |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total potentially dilutive shares (in shares) | 8,156,581 | 2,991,852 | 7,502,200 | 2,579,168 |
| SAFE assumed conversion period | 1 year | |||
| Stock options | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total potentially dilutive shares (in shares) | 1,395,686 | 0 | 1,461,162 | 0 |
| SAFEs | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total potentially dilutive shares (in shares) | 2,787,526 | 0 | 2,067,669 | 0 |
| Convertible preferred stock | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total potentially dilutive shares (in shares) | 3,973,369 | 2,991,852 | 3,973,369 | 2,579,168 |