v3.26.1
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2026
Stock-Based Compensation  
Schedule of cost related to stock-based compensation

Total stock-based compensation related to option issuances was as follows:

  ​ ​ ​

Three Months Ended March 31, 

(in thousands)

2026

  ​ ​ ​

2025

Research and development

$

494

$

607

Selling, general and administrative

 

372

 

639

Total stock-based compensation

$

866

$

1,246

Total stock-based compensation related to restricted stock awards and restricted stock units was as follows:

  ​ ​ ​

Three Months Ended March 31, 

(in thousands)

2026

  ​ ​ ​

2025

Research and development

$

636

$

465

Selling, general and administrative

 

1,278

 

950

Total stock-based compensation

$

1,914

$

1,415

Total stock-based compensation related to warrants was as follows:

  ​ ​ ​

Three Months Ended March 31, 

(in thousands)

2026

  ​ ​ ​

2025

Research and development

$

32

$

120

Selling, general and administrative

 

39

 

184

Total stock-based compensation

$

71

$

304

Schedule of stock option activity

  ​ ​ ​

  ​ ​ ​

Weighted

  ​ ​ ​

Weighted

  ​ ​ ​

Shares

Average

Average

Aggregate

Underlying

Exercise

Remaining

Intrinsic

Options

Price

Term (years)

Value (000s)

Outstanding at January 1, 2026

7,199,571

 

$

6.23

 

7.08

$

1,963

Granted

 

1,328,000

3.82

 

 

Exercised

 

(6,278)

4.06

 

 

4

Forfeited/canceled

 

(146,836)

6.13

 

 

Outstanding March 31, 2026

 

8,374,457

 

$

5.85

 

7.34

$

2,679

Exercisable at March 31, 2026

 

4,461,304

 

$

7.46

 

5.77

$

43

Schedule of restricted stock activity

Restricted Stock

Weighted Average

Awards/Units

Grant Date Fair

Outstanding

Value

Outstanding at January 1, 2026

2,300,651

$

3.95

Granted

1,635,000

3.82

Vested

(215,988)

7.41

Forfeited/canceled

Outstanding March 31, 2026

3,719,663

$

3.72

Schedule of estimated grant-date fair value calculated using Black-Scholes option pricing model

  ​ ​ ​

Three Months Ended March 31, 

 

2026

2025

 

Expected term (in years)

 

6.24

 

5.89

Expected volatility

 

112

%  

79

%

Risk-free interest rate

 

3.80

%  

4.40

%

Expected dividend yield

 

0

%  

0

%

Fair value of common stock

3.27

3.76