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Segment Information (Tables)
3 Months Ended
Mar. 31, 2022
Segment Reporting [Abstract]  
Schedule of geographic region
   Three months ended
March 31,
 
   2022   2021 
   (in thousands) 
         
North America  $768   $354 
Asia   193    139 
Other   11    2 
Total revenue  $972   $495