Inventories

9 Months Ended

Sep. 30, 2020

(4) Inventories

Components of inventories at September 30, 2020 and December 31, 2019 are summarized as follows:


(in thousands)	September 30, 2020		December 31, 2019
Raw materials	$	40,371	$	42,066
Work in process	8,584		5,496
Finished goods and parts	77,927		63,544
Inventories	$	126,882	$	111,106

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 $18,222 and $12,812 as of September 30, 2020 and December 31, 2019, 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 15. As a result, for the nine months ended September 30, 2020, we recorded a charge of $10,894 to products costs of sales, primarily attributable to inventory, accessories and inventory commitments for these products. We have ceased production for these items.