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Property, Plant and Equipment, and Asset Impairment (Tables) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2024 | Dec. 31, 2023
Property, Plant and Equipment, and Asset Impairment |  |
Schedule of Property, Plant and Equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Estimated Useful |  | September 30, |  | December 31,
($ in thousands) | ​ | Life (in years) | ​ | 2024 | ​ | 2023
Leasehold improvements |  | 9 | ​ |  | 7,694 | ​ |  | 7,694
Construction in process |  | N/A | ​ |  | — | ​ |  | 29
Total property, plant and equipment | ​ | ​ | ​ |  | 7,694 | ​ |  | 7,723
Less: impairment loss | ​ | ​ | ​ | ​ | (2,176) | ​ | ​ | —
Less: accumulated depreciation | ​ | ​ | ​ | ​ | (5,097) | ​ | ​ | (4,476)
Property, plant and equipment, net | ​ | ​ | ​ | $ | 421 | ​ | $ | 3,247
| Mustang’s property, plant and equipment consisted of the following:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Estimated Useful |  | December 31, |  | December 31,
($ in thousands) | ​ | Life (in years) | ​ | 2023 | ​ | 2022
Computer equipment |  | 3 | ​ | $ | — | ​ | $ | 145
Furniture and fixtures |  | 5 | ​ |  | — | ​ |  | 370
Machinery and equipment |  | 5 | ​ |  | — | ​ |  | 8,632
Leasehold improvements |  | 9 | ​ |  | 7,694 | ​ |  | 7,694
Total property, plant and equipment | ​ | ​ | ​ |  | 7,694 | ​ |  | 16,841
Less: accumulated depreciation | ​ | ​ | ​ |  | (4,476) | ​ |  | (8,401)
Property, plant and equipment, net | ​ | ​ | ​ | $ | 3,218 | ​ | $ | 8,440

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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