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Inventories | 12 Months Ended
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Dec. 31, 2019
Inventory Disclosure [Abstract] |
Inventories | (6) Inventories Components of inventories at December 31, 2019 and 2018 are summarized as follows:
(in thousands) | 2019 |  | 2018
Raw materials | $ | 42,066 |  |  | $ | 49,624 |
Work in process | 5,496 |  |  | 2,969 |
Finished goods and parts | 63,544 |  |  | 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.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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