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Property, Plant and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment, Net [Abstract]  
Schedule of property, plant and equipment
  

December 31,

2021

  

December 31,

2022

 
Electronic equipment  $910   $864 
Office equipment and furniture   78    66 
Leasehold improvement   85    186 
    1,073    1,116 
Less: accumulated depreciation   (831)   (956)
   $242   $160