v3.26.1
Equity Incentive Plan
12 Months Ended
Dec. 31, 2025
Share-based Payment Arrangement [Abstract]  
Equity Incentive Plan
13. EQUITY INCENTIVE PLAN
2015 Equity
Incentive
Plan and 2025 Equity
Incentive
Plan
Restricted stock units are converted into the Company’s ordinary shares upon vesting on
one-for-one
basis. The vesting of restricted stock unit is subject to the employee’s continuing service to the Company. The cost of these awards is determined using the fair value of the Company’s ordinary share on the date of the grant, and compensation is recognized on a straight-line basis over the requisite service period. The Company’s restricted stock units are considered
non-vested
share awards as defined under ASC 718.
On June 3, 2015, the Company adopted its 2015 Equity Incentive Plan (“the 2015 Plan”). The 2015 Plan provides for the grant of stock options, stock bonuses, restricted stock awards, restricted stock units and stock appreciation rights, which may be granted to employees (including officers), directors and consultants. The 2015 Plan reserved 20,000 thousand shares of ordinary shares for issuance upon exercise of stock options and restricted stock units.
On June 4, 2025, the Company adopted its 2025 Equity Incentive Plan (“the 2025 Plan”). The 2025 Plan provides for the grant of stock options, stock bonuses, restricted stock awards, restricted stock units and stock appreciation rights, which may be granted to employees (including officers), directors and consultants. The 2025 Plan reserved 20,000 thousand shares of ordinary shares for issuance upon exercise of stock options and restricted stock units.
 
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  
  
 
 
 
The related tax effect for stock-based compensation benefit (expense) were US$(178) thousand, US$173 thousand and US$(105) thousand for 2023, 2024 and 2025, respectively. The related tax benefit from stock-based compensation expense for restricted stock units exercised during 2023, 2024 and 2025 was US$4,925 thousand, US$3,073 thousand and US$3,490 thousand, respectively. The related tax effect was determined using applicable tax rates.
Restricted Stock Units
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  
  
 
 
    
 
 
    
As of December 31, 2025, there was US$6,873 thousand of total unrecognized compensation cost related to restricted stock units granted under the 2015 Plan and the 2025 Plan.
 
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