XML 36 R29.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Stock-based Awards Activity Under the 2008 Plan, 2015 Plan and Inducement Plan

The following table provides a summary of stock-based awards activity for the six months ended June 30, 2024:

Stock Options:

 

Outstanding at December 31, 2023

 

 

9,633,067

 

Granted

 

 

230,000

 

Exercised

 

 

(62,736

)

Expired/cancelled/forfeited

 

 

(65,312

)

Outstanding at June 30, 2024

 

 

9,735,019

 

The total compensation cost related to non-vested stock options not yet recognized as of June 30, 2024, was $7.6 million, which will be recognized over a weighted-average period of approximately 3.0 years.

RSUs:

 

Outstanding at December 31, 2023

 

 

3,488,250

 

Granted

 

 

142,500

 

Vested

 

 

(3,125

)

Forfeited

 

 

(67,500

)

Outstanding at June 30, 2024

 

 

3,560,125

 
Stock-based Compensation Expense included in Accompanying Statements of Operations and Comprehensive Loss

Stock-based compensation expense is included in the following line items in the accompanying statements of operations and comprehensive loss for the three and six months ended June 30, 2024 and 2023 (in thousands):

 

 

 

Three months ended June 30,

 

 

Six months ended June 30,

 

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

Research and development

 

$

600

 

 

$

280

 

 

$

1,903

 

 

$

534

 

General and administrative

 

 

1,596

 

 

 

678

 

 

 

2,550

 

 

 

1,288

 

Total stock-based compensation

 

$

2,196

 

 

$

958

 

 

$

4,453

 

 

$

1,822