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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Summary of compensation expense related to stock-based awards

Three Months Ended June 30, 

Six Months Ended June 30, 

(in thousands)

2023

    

2022

    

2023

    

2022

Research and development

$

2,213

$

1,707

$

4,060

$

2,261

General and administrative

 

5,112

 

3,840

 

9,727

 

6,472

Total stock-based compensation

$

7,325

$

5,547

$

13,787

$

8,733

 

Summary of share-based compensation expense by award type

Three Months Ended June 30, 

Six Months Ended June 30, 

(in thousands)

2023

2022

2023

2022

Restricted Stock Units ("RSUs")

$

2,723

$

1,818

$

4,684

$

1,818

Earn-Out Restricted Shares

2,166

1,972

4,301

3,565

Performance Stock Units ("PSUs")

1,406

1,075

2,732

1,075

Restricted Stock Awards ("RSAs")

926

568

1,856

2,046

Stock options

104

114

214

229

Total

$

7,325

$

5,547

$

13,787

$

8,733