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Business and geographic segments (Tables) | 12 Months Ended
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Dec. 31, 2024
Segment Reporting [Abstract] |
Schedule of Business Segment Information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
​ | ​ | 2022 |  | 2023 |  | 2024
​ | ​ | (In thousands)
Net sales: | ​ | ​ |  |  | ​ |  |  | ​ |
Security Products | ​ | $ | 114,519 | ​ | $ | 121,182 | ​ | $ | 115,243
Marine Components | ​ |  | 52,043 | ​ |  | 40,105 | ​ |  | 30,698
Total | ​ | $ | 166,562 | ​ | $ | 161,287 | ​ | $ | 145,941
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cost of sales: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Security Products | ​ | $ | 79,068 | ​ | $ | 82,781 | ​ | $ | 80,509
Marine Components | ​ | ​ | 38,695 | ​ | ​ | 29,287 | ​ | ​ | 24,069
Total | ​ | $ | 117,763 | ​ | $ | 112,068 | ​ | $ | 104,578
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Gross margin: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Security Products | ​ | $ | 35,451 | ​ | $ | 38,401 | ​ | $ | 34,734
Marine Components | ​ | ​ | 13,348 | ​ | ​ | 10,818 | ​ | ​ | 6,629
Total | ​ | $ | 48,799 | ​ | $ | 49,219 | ​ | $ | 41,363
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Segment selling, general and administrative expense: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Security Products | ​ | $ | 12,707 | ​ | $ | 13,460 | ​ | $ | 13,894
Marine Components | ​ | ​ | 3,787 | ​ | ​ | 3,600 | ​ | ​ | 3,327
Total | ​ | $ | 16,494 | ​ | $ | 17,060 | ​ | $ | 17,221
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating income: | ​ |  |  | ​ |  |  | ​ |  |
Security Products | ​ | $ | 22,744 | ​ | $ | 24,941 | ​ | $ | 20,840
Marine Components | ​ |  | 9,561 | ​ |  | 7,218 | ​ |  | 3,302
Segment operating income | ​ | ​ | 32,305 | ​ | ​ | 32,159 | ​ | ​ | 24,142
Corporate operating expenses | ​ |  | (6,869) | ​ |  | (6,724) | ​ |  | (7,119)
Operating income | ​ |  | 25,436 | ​ |  | 25,435 | ​ |  | 17,023
Interest income | ​ |  | 1,877 | ​ |  | 4,168 | ​ |  | 4,714
Income before income taxes | ​ | $ | 27,313 | ​ | $ | 29,603 | ​ | $ | 21,737
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation and amortization: | ​ |  |  | ​ |  |  | ​ |  |
Security Products | ​ | $ | 2,801 | ​ | $ | 2,748 | ​ | $ | 2,489
Marine Components | ​ |  | 1,167 | ​ |  | 1,217 | ​ |  | 1,202
Corporate | ​ |  | 9 | ​ |  | 8 | ​ |  | —
Total | ​ | $ | 3,977 | ​ | $ | 3,973 | ​ | $ | 3,691
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Capital expenditures: |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Security Products | ​ | $ | 2,015 | ​ | $ | 970 | ​ | $ | 603
Marine Components | ​ |  | 1,680 | ​ |  | 160 | ​ |  | 829
Total | ​ | $ | 3,695 | ​ | $ | 1,130 | ​ | $ | 1,432
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net sales point of destination: |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
United States | ​ | $ | 153,982 | ​ | $ | 155,092 | ​ | $ | 141,328
Canada | ​ |  | 9,227 | ​ |  | 3,153 | ​ |  | 1,860
Mexico | ​ |  | 722 | ​ |  | 829 | ​ |  | 774
Other | ​ |  | 2,631 | ​ |  | 2,213 | ​ |  | 1,979
Total | ​ | $ | 166,562 | ​ | $ | 161,287 | ​ | $ | 145,941
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2022 |  | 2023 |  | 2024
​ | ​ | (In thousands)
Total assets: |  | ​ |  |  | ​ |  |  | ​ |
Security Products | ​ | $ | 80,671 | ​ | $ | 78,519 | ​ | $ | 74,999
Marine Components | ​ |  | 26,372 | ​ |  | 24,619 | ​ |  | 22,591
Corporate | ​ |  | 70,344 | ​ |  | 84,466 | ​ |  | 65,454
Total | ​ | $ | 177,387 | ​ | $ | 187,604 | ​ | $ | 163,044
​

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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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