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Inventories
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
(6) Inventories

Components of inventories at December 31, 2019 and 2018 are summarized as follows:
(in thousands)20192018
Raw materials$42,066  $49,624  
Work in process5,496  2,969  
Finished goods and parts63,544  80,568  
Inventories$111,106  $133,161  

We record a reserve to the carrying value of our inventory to reflect the rapid technological change in our industry that impacts the market for our products. The inventory reserve was $12,812 and $10,310 as of December 31, 2019 and 2018, respectively.