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Equity Incentive Plan (Tables)
12 Months Ended
Dec. 31, 2025
Equity Incentive Plan  
Schedule of assumptions used in valuation of stock options

Year ended December 31,

  ​ ​ ​

2025

  ​ ​ ​

2024

Expected volatility

 

83.0%-83.6%

 

83.8%-92.3%

Risk‑free rate

 

3.99%-4.38%

4.18%-4.64%

Expected dividend yield

 

0%

  ​

0%

Expected term in years

 

5.5-10.0

 

5.5-10.0

Summary of stock option activity

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

Weighted

  ​ ​ ​

Weighted

  ​ ​ ​

  ​ ​ ​

average

average

exercise

remaining

Aggregate

Number of

price per

contractual

intrinsic

options

share

term (in years)

value

Outstanding at December 31, 2023

596,466

$

72.95

6.2

Granted

 

 

147,340

5.79

 

  ​

Cancelled/Forfeited

 

 

(28,186)

5.36

 

  ​

Outstanding at December 31, 2024

715,620

$

61.79

6.1

Granted

 

 

116,040

2.09

 

  ​

 

  ​

Cancelled/Forfeited

 

 

(20,539)

7.24

 

  ​

 

  ​

Outstanding at December 31, 2025

811,121

$

54.63

 

5.6

$

Exercisable at December 31, 2025

624,537

$

69.83

 

4.7

$

Vested or expected to vest at December 31, 2025

811,121

$

54.63

 

5.6

$

Summary of restricted stock units activity

Weighted

average

grant date

Shares

fair value

Outstanding at December 31, 2023

23,870

$

10.00

Granted

23,090

5.56

Vested

(10,518)

9.42

Cancelled/Forfeited

(6,730)

5.25

Outstanding at December 31, 2024

29,712

$

7.83

Granted

18,450

2.02

Vested

(17,154)

7.94

Cancelled/Forfeited

Outstanding at December 31, 2025

31,008

$

4.31