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Stock-Based Compensation - Additional Information (Details) |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2026 USD ($) shares | Jun. 30, 2026 USD ($) Installment $ / shares shares | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) Installment $ / shares shares | Jun. 30, 2025 USD ($) $ / shares shares | Jan. 31, 2026 shares | Dec. 31, 2025 $ / shares shares | Dec. 31, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of options |  | 12,233,799 |  | 12,233,799 |  |  | 8,569,619 |
Exercise price | $ / shares |  | $ 8.55 |  | $ 8.55 |  |  | $ 4.6 |
Number of stock options granted |  |  |  | 4,211,692 |  |  |  |
Stock-based compensation expense | $ |  | $ 36,863,000 | $ 1,756,000 | $ 39,432,000 | $ 3,375,000 |  |  |
Common Stock [Member] | 2026 Equity incentive plan |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock, initially reserved for issuance |  |  |  |  |  | 6,020,000 |  |
Common Stock [Member] | 2026 Employee stock purchase plan |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock, initially reserved for issuance | 510,000 | 0 |  | 0 |  |  |  |
Board of Directors and Chief Executive Officer | 2026 Equity incentive plan |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options granted |  | 687,816 |  |  |  |  |  |
Fully vested equity awards granted | 2,477,978 |  |  |  |  |  |  |
Stock ownership percentage | 12.50% |  |  |  |  |  |  |
Non-cash stock-based compensation expense | $ | $ 32,200,000 | $ 2,100,000 |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of options |  |  |  |  |  |  |  | 152,514
Cliff vesting period |  |  |  | 1 year |  |  |  |
Vesting period for stock options issued under the plan |  |  |  | 4 years |  |  |  |
Equity Incentive Plans | Performance-Based Options |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Exercise price | $ / shares |  |  |  |  |  |  |  | $ 7.39
Number of stock options granted |  |  |  | 76,256 |  |  |  |
Shares available for future grants |  |  |  |  |  |  |  | 228,770
Number of annual installments vested | Installment |  | 3 |  | 3 |  |  |  |
Stock-based compensation expense | $ |  |  |  | $ 600,000 |  |  |  |
Equity Incentive Plans | Stock Option Activity |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized stock-based compensation expense | $ |  | $ 24,600,000 |  | $ 24,600,000 |  |  |  |
Unrecognized stock-based compensation expense, remaining weighted average period |  |  |  | 2 years 7 months 6 days |  |  |  |
Weighted-average grant date fair value of options granted | $ / shares |  |  |  | $ 11.88 | $ 5.66 |  |  |
2024 Plan Restricted Stock Awards | Board of Directors and Chief Executive Officer |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted stock awards, granted |  |  |  | 1,990,001 |  |  |  |
2024 Plan Restricted Stock Awards | Service-Based Vesting | Board of Directors and Chief Executive Officer |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period for stock options issued under the plan |  |  |  | 3 years |  |  |  |
Restricted stock awards, granted |  |  |  | 796,000 |  |  |  |
2024 Plan Restricted Stock Awards | Performance Based Vesting | Board of Directors and Chief Executive Officer |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted stock awards, granted |  |  |  | 1,194,001 |  |  |  |
2024 Plan Restricted Stock Awards | Unvested Amount Subject to Accelerated Vesting Upon Close of Series B Financing | Board of Directors and Chief Executive Officer |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unvested amounts, percentage |  |  |  | 50.00% |  |  |  |
2024 Plan Restricted Stock Awards | Restricted Stock Awards |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized stock-based compensation expense | $ |  | 0 |  | $ 0 |  |  |  |
Restricted stock awards, granted |  |  |  | 0 | 0 |  |  |
Total fair value of restricted stock awards, vested | $ |  |  |  | $ 500,000 | $ 100,000 |  |  |
Stock-based compensation expense | $ |  | $ 100,000 | $ 100,000 | $ 500,000 | $ 100,000 |  |  |
2024 Plan Restricted Stock Awards | Restricted Stock Awards | Unvested Amount Subject to Future Acceleration Upon Close of Initial Public Offering | Board of Directors and Chief Executive Officer | IPO |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unvested amounts, percentage |  |  |  | 50.00% |  |  |  |

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