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Inventories | 12 Months Ended
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Dec. 31, 2021
Inventory Disclosure [Abstract] |
Inventories | (8) Inventories Components of inventories at December 31, 2021 and 2020 are summarized as follows:
(in thousands) | 2021 |  | 2020
Raw materials | $ | 23,530 |  |  | $ | 23,762 |
Work in process | 5,173 |  |  | 5,912 |
Finished goods and parts | 64,184 |  |  | 86,993 |
Inventories | $ | 92,887 |  |  | $ | 116,667 |
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 w as $16,509 and $20,125 as of December 31, 2021 and 2020, respectively. In June 2020, as part of our assessment of prospective sales and evaluation of inventory, we determined the end-of-life for certain product lines. The end-of-life determination for these products reflects management's plans to focus our resources that are better aligned with our new strategic focus, as further discussed in Note 25. As a result, for the year ended December 31, 2020, we recorded a charge o f $10,894 to products costs of sales, primarily attributable to inventory, accessories and inventory commitments for these products. W e have ceased production for these items. There was no material product line life ended for year ended December 31, 2021.

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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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