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Inventories (Tables)
 6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net of Valuation Allowances Our inventories consisted of the following (in thousands):
As of
June 30, 2020December 31, 2019
Finished goods$19,283  $49,853  
Parts and components2,027  4,915  
Total inventories$21,310  $54,768