Summary of Significant Accounting Policies - Summary of Common Stock Subject to Redemption (Detail) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2023 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Temporary Equity [Line Items] | |||||||||||||
| Remeasurement adjustment of Class A common stock to redemption value | $ 66,186 | $ 51,044 | $ 90,250 | $ 92,073 | $ 102,198 | $ 212,490 | |||||||
| Common Class A [Member] | |||||||||||||
| Temporary Equity [Line Items] | |||||||||||||
| Class A common stock subject to possible redemption | 6,249,923 | 6,183,737 | 8,736,618 | $ 8,646,368 | 8,593,900 | 8,501,827 | 17,912,636 | $ 17,700,146 | $ 17,444,748 | $ 17,144,935 | $ 238,626,268 | $ 236,385,597 | $ 234,600,000 |
| Remeasurement adjustment of Class A common stock to redemption value | $ 66,186 | 51,044 | $ 90,250 | $ 52,468 | $ 92,073 | 102,198 | $ 212,490 | $ 255,398 | $ 299,813 | 1,003,291 | $ 2,240,671 | $ 1,785,597 | |
| Redemption of Class A common stock | $ (2,603,925) | $ (9,513,007) | $ (222,484,624) | ||||||||||