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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventories [Abstract]  
Schedule of Inventories

Inventories consisted of the following (in thousands):



 September 30, 2019 
 December 31, 2018 

Finished goods

 $  496  
 $  949  
Components   269  
  340  

Total

 $  765  
 $  1,289