Leases - Schedule of other information related to the Company's leases (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Leases [Abstract] | ||||||
| Cash paid for amounts included in the measurement of lease liabilities | $ 58,000 | $ 55,000 | $ 172,000 | $ 165,000 | $ 220,302 | $ 193,006 |
| Weighted-average remaining lease term (in years) | 3 years 2 months 12 days | 4 years 1 month 6 days | 3 years 2 months 12 days | 4 years 1 month 6 days | 3 years 9 months 18 days | 4 years 4 months 24 days |
| Weighted-average discount rate | 9.94% | 9.94% | 9.94% | 9.94% | 9.94% | 9.94% |