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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2020
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, 2019 and 2020 (in thousands):

 

 

 

 

 

 

 

 

 

 

December 31, 

 

December 31, 

 

    

2019

    

2020

Research and development tax credit receivable

 

$

1,326

 

$

1,313

Prepayments and VAT receivable

 

 

703

 

 

684

Other current assets

 

 

103

 

 

66

 

 

$

2,132

 

$

2,063