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Stock-Based Awards (Tables)
6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Summary of stock-based compensation expense was classified in the statements of operations and comprehensive loss

Stock-based compensation expense was classified in the condensed consolidated statements of operations and comprehensive loss as follows:

Three Months Ended June 30, 

Six Months Ended June 30, 

(in thousands)

   

2021

    

2020

   

2021

    

2020

    

Research and development expenses

$

2,376

$

936

$

4,274

$

1,763

General and administrative expenses

 

2,001

 

432

 

3,582

 

1,109

Total

$

4,377

$

1,368

$

7,856

$

2,872