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Geographic information (Tables)
6 Months Ended
Jun. 30, 2021
Geographic information  
Schedule of long-lived assets, including operating lease right-of-use assets, held in different geographic regions

June 30, 

December 31,

    

2021

    

2020

United States

$

1,454

$

1,708

United Kingdom

 

4,427

 

1,899

$

5,881

$

3,607