v3.26.1
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2026
Stock-Based Compensation  
Summary of stock option activity

Options Outstanding and Exercisable

Weighted

Weighted

Average

Aggregate

Average

Remaining

Intrinsic

Number of

Exercise

Contractual

Value(1)

  ​ ​ ​

Shares

  ​ ​ ​

Price

  ​ ​ ​

Life (Years)

  ​ ​ ​

(in thousands)

Outstanding as of December 31, 2025

 

848,966

$

73.76

 

6.5

$

Granted

151,480

$

10.85

Exercised

(2,488)

$

5.76

Forfeitures

(2,978)

$

11.56

Outstanding as of March 31, 2026

994,980

$

64.54

6.8

179

Exercisable as of March 31, 2026

 

681,158

$

88.89

 

5.8

$

50

(1)The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying options and the estimated fair value of the common stock for the options that were in the money at December 31, 2025 and March 31, 2026.
Summary of stock based compensation expense recorded

Three Months Ended

March 31, 

(in thousands)

  ​ ​ ​

2026

  ​ ​ ​

2025

Research and development

$

124

$

579

General and administrative

 

220

 

784

Total stock-based compensation expense

$

344

$

1,363

Summary of assumptions used in the Black Scholes option pricing model for stock options granted

Three Months Ended

March 31, 

  ​ ​ ​

2026

  ​ ​ ​

2025

Expected term

 

6.1

years 

6.1

years 

Expected volatility

 

90.8

%

90.5

%

Risk free interest rate

 

3.9

%

4.4

%

Expected dividend yield

 

%

%