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Inventory | 12 Months Ended
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Dec. 31, 2024
Inventory |
Inventory | 7. Inventory Inventory is comprised of the following: ​
​ | ​ | ​ | ​ | ​ | ​
​ | December 31,
(in thousands) | 2024 | ​ | 2023
Parts and supplies | $ | 76,505 | ​ | $ | 70,759
Work in progress |  | 13,181 | ​ |  | 11,002
Inventory | $ | 89,686 | ​ | $ | 81,761
​ During the years ended December 31, 2024, 2023 and 2022 we recorded write–downs to inventory of $0.6 million, $0.5 million and $1.6 million, respectively, for inventory considered to be excess, obsolete or carried at an amount in excess of net realizable value.

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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 -Topic 330 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/330/tableOfContent + Details
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