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Accounts receivable, net - Schedule of Accounts receivable, net (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (70)	$ (70)
Total accounts receivable, net	14,113	17,061
Security Products
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable, net	12,149	14,950
Marine Components
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable, net	$ 2,034	$ 2,181

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