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Segment information (Tables) | 12 Months Ended
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Dec. 31, 2024
Segment information |
Schedule of segment information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended December 31,
​ | ​ | 2024 | ​ | 2023 | ​ | 2022
Revenues | ​ | $ | 237,118 | ​ | $ | 289,025 | ​ | $ | 325,225
Less: | ​ |  |  | ​ |  |  | ​ |  |
Cost of materials and plant overhead | ​ |  | 157,508 | ​ |  | 163,701 | ​ |  | 151,953
Payroll expense and benefits | ​ |  | 31,625 | ​ |  | 28,186 | ​ |  | 27,467
Interest (income) expense – net | ​ |  | (476) | ​ |  | 8,352 | ​ |  | 14,327
Depreciation and amortization | ​ |  | 6,387 | ​ |  | 5,782 | ​ |  | 5,977
Professional fees | ​ | ​ | 6,720 | ​ | ​ | 4,423 | ​ | ​ | 3,848
Other operating expenses1 | ​ |  | 5,577 | ​ |  | 8,761 | ​ |  | 4,471
Income taxes | ​ |  | 7,639 | ​ |  | 17,573 | ​ |  | 13,381
Other income | ​ |  | (2,250) | ​ |  | — | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 24,388 | ​ | $ | 52,247 | ​ | $ | 103,801
1Other operating expenses include miscellaneous, individually insignificant operating expenses. The Company’s CODM reviews these items in aggregate.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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