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Accounts receivable, net | 12 Months Ended
--- | ---
Dec. 31, 2023
Receivables [Abstract] |
Accounts Receivable, net | Note 4 – Accounts receivable, net: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | 2023
​ | ​ | (In thousands)
Accounts receivable, net: |  | ​ |  |  | ​ |
Security Products | ​ | $ | 13,767 | ​ | $ | 14,950
Marine Components | ​ |  | 4,143 | ​ |  | 2,181
Allowance for doubtful accounts | ​ |  | (70) | ​ |  | (70)
Total accounts receivable, net | ​ | $ | 17,840 | ​ | $ | 17,061
​

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