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Inventory, net (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Summary of inventory, net
Inventory, net, consists of the following:
 June 30, 2020December 31, 2019
Raw materials$—  $ 
Finished goods15  13  
Allowance for obsolescence(3) (5) 
Total inventory, net$12  $11