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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Activity

A summary of the 2023 Plan option activity and related information follows (in thousands, except weighted averages):

 

  

Number of

Options

Outstanding

  

Weighted

Average

Exercise Price

  

Weighted-

Average

Remaining

Contractual

Life

(Years)

  

Aggregate

Intrinsic Value

 
Outstanding at January 1, 2025   77   $220.92    5.67   $          5 
Options granted   217    4.23           
Options exercised       -            
Options forfeited or cancelled   (17)   252.37           
Outstanding at December 31, 2025   277   $49.57    8.39   $ 
Exercisable at December 31, 2025   78   $160.73    5.54   $ 
Summary of Restricted Stock Unit Activity

A summary of the 2023 Plan restricted stock unit (RSU) activity and related information follows (in thousands, except weighted average grant date fair value):

 

  

Number of

Units

Outstanding

  

Weighted

Average

Grant-Date Fair Value

 
Balance at January 1, 2025             2   $13.80 
Vested and released   (2)   13.80 
Balance at December 31, 2025      $ 
Schedule of Stock-Based Compensation Expense

The Company recorded stock-based compensation expense in the following categories on the accompanying consolidated statements of operations for the periods presented (in thousands):

 

   2025   2024 
   Year Ended December 31, 
   2025   2024 
Research and development  $426   $751 
General and administrative   1,682    2,206 
Total stock-based compensation expense  $2,108   $2,957 
Schedule of Stock Options Valuation Assumptions

 

   Year Ended December 31, 
   2025   2024 
Expected volatility   87.84%   85.63%
Risk-free interest rate   3.93%   4.21%
Expected option life (in years)   5.78    5.64 
Expected dividend yield   0.0%   0.0%