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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Activity The following table summarizes the Company’s stock option activity during the three months ended March 31, 2024:

 

Number of
Shares

 

 

Weighted-
Average
Exercise
Price

 

 

Weighted-
Average
Remaining
Contractual
Term
(In Years)

 

 

Aggregate
Intrinsic
Value
(in
thousands)

 

Outstanding at December 31, 2023

 

 

1,112,275

 

 

$

7.50

 

 

 

6.87

 

 

$

10,712

 

Assumed in reverse recapitalization

 

 

14,214

 

 

$

8.84

 

 

 

 

 

 

 

Granted

 

 

902,331

 

 

$

19.37

 

 

 

 

 

 

 

Exercised

 

 

 

 

$

 

 

 

 

 

 

 

Cancelled

 

 

 

 

$

 

 

 

 

 

 

 

Outstanding at March 31, 2024

 

 

2,028,820

 

 

$

12.50

 

 

 

8.00

 

 

$

10,620

 

Vested and expected to vest at
   March 31, 2024

 

 

2,028,820

 

 

$

12.50

 

 

 

8.00

 

 

$

10,620

 

Exercisable at March 31, 2024

 

 

670,992

 

 

$

7.08

 

 

 

5.35

 

 

$

6,707

 

 

Summary of Assumptions Used to Value Stock Options Granted

The underlying assumptions used to value stock options granted using the Black-Scholes option-pricing model during the three months ended March 31, 2024 and 2023 were as follows:

 

Three Months Ended March 31,

 

2024

 

2023

Risk-free interest rate range

 

4.24%

 

3.61%

Expected dividend rate

 

 %

 

 %

Expected term (years) range

 

5.88 - 6.11

 

6.02

Expected stock price volatility range

 

92.0% – 92.2%

 

88.9%

Summary of Stock-Based Compensation Expense

The Company recorded stock-based compensation expense in the following expense categories of its statements of operations (in thousands):

 

 

Three Months Ended March 31,

 

 

2024

 

 

2023

 

Research and development

 

$

157

 

 

$

109

 

General and administrative

 

 

260

 

 

 

187

 

Total stock-based compensation expense

 

$

417

 

 

$

296