v3.25.4
Statements of Cash flows (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
Cash flows from operating activities:            
Net income (loss) $ 29,146 $ (50,448) $ (52,864) $ (53,433) $ 15,693 $ (13,191)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:            
Share-based compensation expenses 6,241 21,517 5,375 391 809 539
Changes in current assets and liabilities:            
(Increase) decrease in prepaid expenses and other receivables 4,719 (4,607) (2,982) (6,272) 2,197 (1,454)
Increase (decrease) in accrued expenses and other payables (170,281) 156,175 9,524 35,394 512 1,785
Net cash used in operating activities (114,885) (32,297) (12,137) (65,831) (130,417) (77,759)
Cash flows from investing activities:            
Net cash provided by (used in) investing activities 30,796 1,610   103,581 (148,433) 46,219
Cash flows from financing activities:            
Proceeds from private placement   21,283        
Proceeds from options exercise       1,412 3,793 2,635
Amounts due to a shareholder and an investor         170,690  
Net cash (used in) provided by financing activities (7,981) 11,983 13,777 59,645 191,957 99,935
Cash and cash equivalents at beginning of year 8,337 21,632 56,791 60,980    
Cash and cash equivalents at end of year 26,861 8,337 21,632 56,791 60,980  
Parent Company            
Cash flows from operating activities:            
Net income (loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:            
Share of net loss (profits) of subsidiaries, net of taxes 20,961 11,156 27,556 42,175 (22,769) 10,649
Share-based compensation expenses 6,241 21,517 5,375 433 1,002 539
Changes in current assets and liabilities:            
(Increase) decrease in prepaid expenses and other receivables 837 417 (1,856) 54 (52) (15)
Increase (decrease) in accrued expenses and other payables (173,368) 9,445 5,329 600 177 1,144
Increase (decrease) in amount due to shareholders and other related companies 1,677 (3,791) 1,200      
Net cash used in operating activities (114,506) (11,704) (15,260) (10,171) (5,949) (874)
Cash flows from investing activities:            
(Increase) decrease in amount due from subsidiaries 114,933 (6,525) 551 (3,453) (191,088) (2,202)
Net cash provided by (used in) investing activities 114,933 (6,525) 551 (3,453) (191,088) (2,202)
Cash flows from financing activities:            
Proceeds from private placement   15,437        
Proceeds from shareholder loans     18,750      
Proceeds from options exercise       1,197 3,793 2,635
Amounts due to a shareholder and an investor         170,690  
Net cash (used in) provided by financing activities   15,437 18,750 1,197 174,483 2,635
Net decrease in cash and cash equivalents 427 (2,792) 4,041 (12,427) (22,554) (441)
Cash and cash equivalents at beginning of year 1,339 4,131 90 12,517 35,071 35,512
Cash and cash equivalents at end of year $ 1,766 $ 1,339 $ 4,131 $ 90 $ 12,517 $ 35,071