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Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2021
Accounts Receivable Net Current [Abstract]  
Summary of Accounts Receivable

Accounts receivable consisted of the following as of December 31, 2020 and 2021 (in thousands):

 

 

 

December 31,

2020

 

 

December 31,

2021

 

Trade accounts receivable

 

$

5,747

 

 

$

10,478

 

Allowance for doubtful accounts

 

 

—

 

 

 

—

 

Accounts receivable—net

 

$

5,747

 

 

$

10,478