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INVENTORIES | 3 Months Ended
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Mar. 31, 2024
INVENTORIES |
INVENTORY | 3. INVENTORIES Inventory costs include materials, labor and factory overhead. Inventories are stated at the lower of cost or net realizable value, determined on a moving average unit cost basis. Appropriate consideration is given to obsolescence, valuation and other factors in determining net realizable value. Revisions of these estimates could result in the need for adjustments. Inventories, net of reserves, consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
(in thousands) |  | 2024 |  | 2023
Raw materials | ​ | $ | 86,624 | ​ | $ | 89,048
Work in process | ​ |  | 44,587 | ​ |  | 47,934
Finished goods | ​ |  | 23,948 | ​ |  | 23,077
Chassis | ​ |  | 29,115 | ​ |  | 29,748
Total inventory | ​ | $ | 184,274 | ​ | $ | 189,807
​ For the three months ended March 31, 2024 and 2023, the Company did not recognize impairment of inventory. For the three months ended March 31, 2024 and fiscal year ended December 31, 2023, the Company’s balances are presented net of inventory reserves of $6.9 million and $5.6 million, respectively.

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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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