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Inventories | 9 Months Ended
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Sep. 30, 2021
Inventory Disclosure [Abstract] |
Inventories | (6) Inventories Components of inventories at September 30, 2021 and December 31, 2020 are summarized as follows:
(in thousands) | September 30, 2021 |  | December 31, 2020
Raw materials | $ | 23,994 |  |  | $ | 23,762 |
Work in process | 6,124 |  |  | 5,912 |
Finished goods and parts | 59,207 |  |  | 86,993 |
Inventories | $ | 89,325 |  |  | $ | 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 was $17,108 and $20,125 as of September 30, 2021 and December 31, 2020, respectively. At September 30, 2021, our obligation to repurchase inventory, included in accrued and other liabilities on our condensed consolidated balance sheets, was $371, relating to the sale of inventory to an assembly manufacturer and we had a commitment of $5,681 with the assembling manufacturer to purchase certain materials and supplies they acquired from third parties. At September 30, 2021, inventory held at assemblers was $3,123.

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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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