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Inventory (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventory

   June 30,
2020
   December 31,
2019
 
Raw materials  $494   $294 
Work-in-process   26    124 
Finished goods   805    596 
Ending inventory  $1,325   $1,014