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Inventories, Net (Tables) | 12 Months Ended
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Dec. 31, 2022
Inventory Disclosure [Abstract] |
Inventories, Net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2022
​ | ​ | (In thousands)
Raw materials: |  | ​ |  |  | ​ |
Security Products | ​ | $ | 3,640 | ​ | $ | 4,172
Marine Components | ​ |  | 1,402 | ​ |  | 2,073
Total raw materials | ​ |  | 5,042 | ​ |  | 6,245
Work-in-process: | ​ |  |  | ​ |  |
Security Products | ​ |  | 12,721 | ​ |  | 14,193
Marine Components | ​ |  | 4,046 | ​ |  | 5,790
Total work-in-process | ​ |  | 16,767 | ​ |  | 19,983
Finished goods: | ​ |  |  | ​ |  |
Security Products | ​ |  | 2,271 | ​ |  | 3,163
Marine Components | ​ |  | 1,562 | ​ |  | 1,899
Total finished goods | ​ |  | 3,833 | ​ |  | 5,062
Total inventories, net | ​ | $ | 25,642 | ​ | $ | 31,290

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