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Prepaid Expenses and Other Current Assets
 12 Months Ended
Dec. 31, 2021
Prepaid Expense And Other Assets Current [Abstract]  
Prepaid Expenses and Other Current Assets

4. Prepaid expenses and other current assets

Prepaid expenses and other current assets consisted of the following (in thousands):

 

 

 

December 31,

 

 

 

2021

 

 

2020

 

UK R&D tax credit

 

$

10,523

 

 

$

6,214

 

Prepaid research and development

 

 

3,608

 

 

 

751

 

Prepaid insurance

 

 

1,525

 

 

 

21

 

VAT recoverable

 

 

650

 

 

 

1,125

 

Deferred offering costs

 

 

—

 

 

 

1,007

 

Other current assets

 

 

2,124

 

 

 

830

 

 

 

$

18,430

 

 

$

9,948