Other non-operating expenses - Additional Information (Detail) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Aug. 11, 2025
USD ($)
|
Jul. 03, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
CNY (¥)
|
|
| Other Nonoperating Income And Expense [Abstract] | ||||
| Litigation settlement, fee expense | $ 1,985 | $ 1,985 | $ 1,985 | ¥ 14,254 |
| Payments for legal settlements | $ 1,985 | |||