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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2021
Prepaid Expenses And Other Current Assets [Abstract]  
Schedule of prepaid expenses and other current assets

The following is a summary of prepaid expenses and other current assets at December 31, 2020 and 2021 (in thousands):

 

December 31, 

December 31, 

    

2020

    

2021

Research and development tax credit receivable

$

1,313

$

3,727

Prepayments and VAT receivable

684

 

577

Other current assets

 

66

79

$

2,063

$

4,383