Accounts receivable, net - Schedule of Accounts receivable, net (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (70)	$ (70)
Total accounts receivable, net	17,329	17,061
Security Products
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable, gross	14,293	14,950
Marine Components
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable, gross	$ 3,106	$ 2,181