v3.25.4
Statements of Changes In Shareholders' Equity (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
Condensed Financial Statements Captions [Line Items]            
Balance $ 124,144 $ 134,838 $ 202,725 $ 248,828 $ 214,738 $ 227,891
Balance (in shares) 58,334,115 40,547,379 39,347,991 39,197,991    
Shares issued on exercise of options       $ 1,412 $ 3,793 $ 2,635
Shares issued on exercise of options (in shares)     0 150,000 433,000 578,000
Shares issued on equity awards $ 5,493   $ 5,162      
Stock-based compensation expenses 0 $ 101 213 $ 433 $ 1,002 $ 539
Net Income (Loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
Foreign currency translation adjustment 13,549 (3,048) (20,398) 5,485 13,597 (3,136)
Others 0 0 0 0 5  
Balance $ 172,332 $ 124,144 $ 134,838 $ 202,725 $ 248,828 214,738
Balance (in shares) 60,203,214 58,334,115 40,547,379 39,347,991 39,197,991  
Common Stock            
Condensed Financial Statements Captions [Line Items]            
Balance $ 584 $ 405 $ 393 $ 392 $ 386 $ 382
Balance (in shares) 58,334,115 40,547,379 39,347,991 39,197,991 38,631,991 38,186,991
Shares issued on exercise of options       $ 1 $ 6 $ 4
Shares issued on exercise of options (in shares)       150,000 566,000 445,000
Shares issued on equity awards $ 18   $ 12      
Balance $ 602 $ 584 $ 405 $ 393 $ 392 $ 386
Balance (in shares) 60,203,214 58,334,115 40,547,379 39,347,991 39,197,991 38,631,991
Additional Paid-in Capital            
Condensed Financial Statements Captions [Line Items]            
Balance $ 314,914 $ 272,291 $ 266,928 $ 265,084 $ 260,295 $ 257,125
Shares issued on exercise of options       1,411 3,787 2,631
Shares issued on equity awards 5,475   5,150      
Stock-based compensation expenses   101 213 433 1,002 539
Balance 320,389 314,914 272,291 266,928 265,084 260,295
Accumulated Deficit            
Condensed Financial Statements Captions [Line Items]            
Balance (167,567) (117,119) (64,255) (10,822) (26,520) (13,329)
Net Income (Loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
Others         5  
Balance (138,421) (167,567) (117,119) (64,255) (10,822) (26,520)
Accumulated Other Comprehensive Loss            
Condensed Financial Statements Captions [Line Items]            
Balance (23,787) (20,739) (341) (5,826) (19,423) (16,287)
Foreign currency translation adjustment 13,549 (3,048) (20,398) 5,485 13,597 (3,136)
Balance (10,238) (23,787) (20,739) (341) (5,826) (19,423)
Parent Company            
Condensed Financial Statements Captions [Line Items]            
Balance $ 124,142 $ 134,838 $ 202,724 $ 248,828 214,738 227,891
Balance (in shares) 58,334,115 40,547,379 39,347,991 39,197,991    
Shares issued on exercise of options       $ 1,412 3,793 2,635
Shares issued on equity awards $ 5,495 $ 42,700 $ 5,162      
Stock-based compensation expenses   101 213 433 1,002 539
Net Income (Loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
Foreign currency translation adjustment 13,550 (3,049) (20,397) 5,484 13,597 (3,136)
Others         5  
Balance $ 172,333 $ 124,142 $ 134,838 $ 202,724 $ 248,828 214,738
Balance (in shares) 60,203,214 58,334,115 40,547,379 39,347,991 39,197,991  
Parent Company | Common Stock            
Condensed Financial Statements Captions [Line Items]            
Balance $ 583 $ 405 $ 393 $ 392 $ 386 $ 382
Balance (in shares) 58,334,115 40,547,379 39,347,991 39,197,991 38,631,991 38,186,991
Shares issued on exercise of options       $ 1 $ 6 $ 4
Shares issued on exercise of options (in shares)       150,000 566,000 445,000
Shares issued on private placement and equity awards 1,869,099 17,786,736 1,199,388      
Shares issued on equity awards $ 19 $ 178 $ 12      
Balance $ 602 $ 583 $ 405 $ 393 $ 392 $ 386
Balance (in shares) 60,203,214 58,334,115 40,547,379 39,347,991 39,197,991 38,631,991
Parent Company | Additional Paid-in Capital            
Condensed Financial Statements Captions [Line Items]            
Balance $ 314,914 $ 272,291 $ 266,928 $ 265,084 $ 260,295 $ 257,125
Shares issued on exercise of options       1,411 3,787 2,631
Shares issued on equity awards 5,476 42,522 5,150      
Stock-based compensation expenses   101 213 433 1,002 539
Balance 320,390 314,914 272,291 266,928 265,084 260,295
Parent Company | Accumulated Deficit            
Condensed Financial Statements Captions [Line Items]            
Balance (167,567) (117,119) (64,255) (10,822) (26,520) (13,329)
Net Income (Loss) 29,146 (50,448) (52,864) (53,433) 15,693 (13,191)
Others         5  
Balance (138,421) (167,567) (117,119) (64,255) (10,822) (26,520)
Parent Company | Accumulated Other Comprehensive Loss            
Condensed Financial Statements Captions [Line Items]            
Balance (23,788) (20,739) (342) (5,826) (19,423) (16,287)
Foreign currency translation adjustment 13,550 (3,049) (20,397) 5,484 13,597 (3,136)
Balance $ (10,238) $ (23,788) $ (20,739) $ (342) $ (5,826) $ (19,423)