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INVENTORY | 9 Months Ended
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Sep. 30, 2021
INVENTORY |
INVENTORY | NOTE E — INVENTORY Following are the major classes of inventory as of the below dates (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, 2021 |  | December 31, 2020
Used serviceable materials | ​ | $ | 68,222 | ​ | $ | 63,277
Work-in-process | ​ | ​ | 13,622 | ​ | ​ | 20,611
Whole assets | ​ | ​ | 76,236 | ​ | ​ | 56,767
​ | ​ | $ | 158,080 | ​ | ​ | 140,655
Less short term | ​ |  | (80,106) | ​ |  | (85,192)
Long term | ​ | $ | 77,974 | ​ | $ | 55,463
​ The Company did not record inventory reserve for the three months ended September 30, 2021 and 2020, respectively, and recorded an inventory reserve of $4.8 million and $12.9 million for the nine months ended September 30, 2021 and 2020, respectively. These amounts are included in cost of products in the accompanying condensed consolidated statements of operations, due to the Company’s evaluation of the inventory’s net realizable value. ​ The Company recorded inventory scrap loss reserves of $0.1 million and $0.1 million for the three months ended September 30, 2021 and 2020, respectively. The Company recorded inventory scrap loss reserves of $0.2 million and $0.5 million for the nine months ended September 30, 2021 and 2020, respectively, each of which was included in cost of products in the accompanying condensed consolidated statements of operations.

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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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