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Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Inventories consist of the following:

Inventories consist of the following:

 

   June 30, 
2021
   December 31, 
2020
 
         
Raw materials  $4,103   $2,825 
Finished goods   1,548    1,545 
    5,651    4,370 
Allowance for excess inventory quantities   (30)   (30)
   $5,621   $4,340