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Revenue (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue From Contract With Customer [Abstract]  
Summary of Disaggregated Revenue by Geographic Region Total revenue based on the disaggregation criteria described above are as follows (in thousands):

 

 

 

Year Ended December 31,

 

 

 

2021

 

 

2020

 

 

2019

 

 

 

Revenue

 

 

% of Revenue

 

 

Revenue

 

 

% of Revenue

 

 

Revenue

 

 

% of Revenue

 

Revenue by primary geographical market:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

North America

 

$

8,816

 

 

 

95

%

 

$

4,225

 

 

 

88

%

 

$

542

 

 

 

39

%

Europe

 

 

232

 

 

 

3

%

 

 

497

 

 

 

10

%

 

 

842

 

 

 

61

%

Asia

 

 

217

 

 

 

2

%

 

 

121

 

 

 

2

%

 

 

—

 

 

 

0

%

Total

 

$

9,265

 

 

 

100

%

 

$

4,843

 

 

 

100

%

 

$

1,384

 

 

 

100

%

Revenue by timing of recognition:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recognized at a point in time

 

$

1,776

 

 

 

19

%

 

$

1,534

 

 

 

32

%

 

$

819

 

 

 

59

%

Recognized over time

 

 

7,489

 

 

 

81

%

 

 

3,309

 

 

 

68

%

 

 

565

 

 

 

41

%

Total

 

$

9,265

 

 

 

100

%

 

$

4,843

 

 

 

100

%

 

$

1,384

 

 

 

100

%