v3.25.4
Segment Information - Summary of Operations Income (Loss), Net Income (loss) by Geographical Areas (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]            
Operations income $ 29,185 $ 83,205 $ 50,088 $ 62,362 $ 71,206 $ 2,965
Total net income (loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
PRC (excluding Hong Kong)            
Segment Reporting, Revenue Reconciling Item [Line Items]            
Operations income 29,185 83,205 50,088 62,362 71,206 2,965
Total net income (loss) (21,098) (11,059) (27,234) (25,948) 25,062 (8,364)
Hong Kong            
Segment Reporting, Revenue Reconciling Item [Line Items]            
Total net income (loss) $ 50,244 $ (39,389) $ (25,630) $ (27,485) $ (9,369) $ (4,827)