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Inventories | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Inventories |  |
Inventories | Note 5 — Inventories The following table summarizes inventories: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, | ​ | December 31,
​ | ​ | 2024 |  | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Infrared cameras | ​ | $ | 4,334 | ​ | $ | 4,955
Replacement, maintenance, and spare parts | ​ |  | 1,230 | ​ |  | 1,975
Inventories, current | ​ | $ | 5,564 | ​ | $ | 6,930
​ | ​ | ​ | ​ | ​ | ​ | ​
Infrared cameras | ​ | $ | 440 | ​ | $ | 389
Replacement, maintenance, and spare parts | ​ |  | 1,104 | ​ |  | 254
Inventories, noncurrent | ​ | $ | 1,544 | ​ | $ | 643
Total inventories | ​ | $ | 7,108 | ​ | $ | 7,573
​ The Company recorded an inventory write down of $234 for the three months ended March 31, 2024. | Note 7 — Inventories The following table summarizes inventories: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ | ​ | 2023 |  | 2022
Infrared cameras | ​ | $ | 4,955 | ​ | $ | 5,904
Replacement, maintenance, and spare parts | ​ |  | 1,975 | ​ |  | 3,730
Inventories, current | ​ | $ | 6,930 | ​ | $ | 9,634
Infrared cameras | ​ | $ | 389 | ​ | $ | —
Replacement, maintenance, and spare parts | ​ |  | 254 | ​ |  | —
Inventories, noncurrent | ​ | $ | 643 | ​ | $ | —
Total inventories | ​ | $ | 7,573 | ​ | $ | 9,634
​ For the year ended December 31, 2023, the Company recorded an inventory write down of $1,689, which were charged to costs of goods sold in the Consolidated Statements of Operations, related to products that are not expected to be sold in one year based on customer demand and current market conditions. No inventory write down was recognized for the year ended December 31, 2022. The following table summarizes the amount of inventory write-downs to net realizable value recorded for each period (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ | ​ | 2023 |  | 2022
Amount of inventory write-down to net realizable value | ​ | $ | 1,689 | ​ | $ | —
​

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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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