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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Activity The following table summarizes the Company’s stock option activity during the six months ended June 30, 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

 

 

32,685

 

 

$

7.56

 

 

 

 

 

 

 

Granted

 

 

1,060,630

 

 

$

17.09

 

 

 

 

 

 

 

Exercised

 

 

(53,077

)

 

$

7.16

 

 

 

 

 

 

 

Cancelled

 

 

 

 

$

 

 

 

 

 

 

 

Outstanding at June 30, 2024

 

 

2,152,513

 

 

$

12.33

 

 

 

8.23

 

 

$

11,998

 

Vested and expected to vest at
   June 30, 2024

 

 

2,152,513

 

 

$

12.33

 

 

 

8.23

 

 

$

11,998

 

Exercisable at June 30, 2024

 

 

691,080

 

 

$

7.11

 

 

 

5.71

 

 

$

7,135

 

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 and six months ended June 30, 2024 and 2023 were as follows:

 

Three Months Ended June 30,

 

Six Months Ended June 30,

 

2024

 

2023

 

2024

 

2023

Risk-free interest rate range

 

4.21%

 

3.59% – 3.93%

 

4.21% – 4.24%

 

3.59% – 3.93%

Expected dividend rate

 

 %

 

 %

 

 %

 

 %

Expected term (years) range

 

6.11

 

5.45 - 6.12

 

5.85 – 6.11

 

5.45 6.12

Expected stock price volatility range

 

92.2%

 

89.1% – 89.8%

 

92.0% – 92.2%

 

88.9% – 89.8%

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 June 30,

 

 

Six Months Ended June 30,

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

Research and development

 

$

386

 

 

$

133

 

 

$

543

 

 

$

242

 

General and administrative

 

 

950

 

 

 

177

 

 

 

1,210

 

 

 

364

 

Total stock-based compensation expense

 

$

1,336

 

 

$

310

 

 

$

1,753

 

 

$

606