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Stock-Based Compensation
9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation

Note 12.  Stock-Based Compensation

The Company’s stock-based compensation included in its condensed consolidated statements of operations and comprehensive loss, net of forfeitures, was as follows:

Three Months Ended September 30, 

Nine Months Ended September 30, 

(in thousands)

2025

    

2024

    

2025

    

2024

Research and development

$

608

$

3,493

$

2,449

$

6,560

General and administrative

 

1,521

 

3,018

 

6,094

 

9,537

Cost of revenue

 

67

 

321

Total stock-based compensation

$

2,196

$

6,511

$

8,864

$

16,097

 

The following table summarizes stock-based compensation expense by award type, net of forfeitures:

Three Months Ended September 30, 

Nine Months Ended September 30, 

(in thousands)

2025

2024

2025

2024

Earn-Out Restricted Shares

$

$

1,997

$

$

1,997

Restricted Stock Units ("RSUs")

1,774

3,404

6,545

10,093

Performance Stock Units ("PSUs")

176

582

1,089

2,214

Restricted Stock Awards ("RSAs")

245

486

1,197

1,464

Stock options

1

42

33

329

Total

$

2,196

$

6,511

$

8,864

$

16,097

PSUs are measured at their estimated fair value using a Monte Carlo simulation valuation model with the effect of the market condition reflected in the grant date fair value of the award. The fair value of RSUs is estimated based on the closing price of the Company’s Class A common stock at the date of grant.