v3.26.1
Equity Incentive Plan (Tables)
12 Months Ended
Dec. 31, 2025
Share-based Payment Arrangement [Abstract]  
Summary of Stock Option and Restricted Stock Units Activity
The following is a summary of the 2015 Plan and the 2025 Plan, which includes restricted stock units:
 
    
Unit

(in Thousands)
 
Available for grant at January 1, 2023
     9,580  
Restricted stock units granted
     (624
Restricted stock units forfeited
     51  
Available for grant at December 31, 2023
     9,007  
Restricted stock units granted
     (1,225
Restricted stock units forfeited
     18  
  
 
 
 
Available for grant at December 31, 2024
     7,800  
Authorized-2025 Plan
     20,000  
Terminated-2015 Plan
     (7,749
Restricted stock units granted
     (1,460
Restricted stock units forfeited
     24  
  
 
 
 
Available for grant at December 31, 2025
     18,615  
  
 
 
 
Summary of Restricted Stock Units and Changes
A summary of the status of restricted stock units and changes is as follows:
 
    
Number of
Non-vested

Stock Units
(in Thousands)
    
Weighted
Average
Grant
Date

Fair
Value
(US$)
    
Weight
Average
Remaining
Recognition
Period
(Years)
 
Non-vested
at January 1, 2023
     1,977        17.89        0.66  
Restricted stock units granted
     624        13.51     
Restricted stock units vested
     (1,460      18.36     
Restricted stock units forfeited
     (51      16.38     
  
 
 
    
 
 
    
Non-vested
at December 31, 2023
     1,090        15.00        0.13  
Restricted stock units granted
     1,225        15.68     
Restricted stock units vested
     (1,089      14.94     
Restricted stock units forfeited
     (18      15.26     
  
 
 
    
 
 
    
Non-vested
at December 31, 2024
     1,208        15.68        0.25  
Restricted stock units granted
     1,460        19.51     
Restricted stock units vested
     (1,186      15.63     
Restricted stock units forfeited
     (24      19.44     
  
 
 
    
 
 
    
Non-vested
at December 31, 2025
     1,458        19.46        0.29  
  
 
 
    
 
 
    
Stock-based Compensation Expense
The following table shows total stock-based compensation expense included in the Consolidated Statements of Income for the years ended December 31, 2023, 2024 and 2025.
 
    
Year Ended December 31
 
    
2023
    
2024
    
2025
 
    
US$
    
US$
    
US$
 
Cost of sales
     406        311        411  
Research and development
     11,709        11,284        17,874  
Sales and marketing
     1,858        1,954        3,428  
General and administrative
     3,574        3,407        4,570  
  
 
 
    
 
 
    
 
 
 
     17,547        16,956        26,283