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Accrued Expenses and Other Current Liabilities | 3 Months Ended
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Mar. 31, 2025
Payables and Accruals [Abstract] |
Accrued Expenses and Other Current Liabilities | Note 7. Accrued Expenses and Other Current Liabilities The components of accrued expenses and other current liabilities consisted of the following: ​
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(in thousands) | March 31, 2025 |  | December 31, 2024
Employee compensation and related costs | $ | 5,418 | ​ | $ | 6,646
Vendor project charges | ​ | 3,338 | ​ | ​ | 7,500
Professional and consulting services | ​ | 1,433 | ​ | ​ | 1,480
Construction in process | ​ | 575 | ​ | ​ | 1,408
Income taxes payable | ​ | 317 | ​ | ​ | 313
Other |  | 880 | ​ |  | 982
Accrued expenses and other current liabilities | $ | 11,961 | ​ | $ | 18,329

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