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Inventories
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
(4)Inventories

 

   December 31,
   2020  2019
Raw materials and component parts  $66,492   $71,895 
Finished goods   92,330    95,914 
  $158,822   $167,809 

 

Overhead included in inventory aggregated $5.4 million and $4.3 million as of December 31, 2020 and 2019, respectively. Included in inventories is an inventory reserve, which represents the difference between the cost of the inventory and its estimated realizable value, based upon sales forecasts and the physical condition of the inventories. In addition, and as necessary, specific reserves for future known or anticipated events may be established. Inventory reserves aggregated $9.4 million and $4.9 million as of December 31, 2020 and 2019, respectively.