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Accounts receivable, net - Schedule of Accounts receivable, net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]    
Allowance for doubtful accounts $ (70) $ (70)
Total accounts receivable, net 15,044 17,840
Security Products    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, gross 11,462 13,767
Marine Components    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, gross $ 3,652 $ 4,143