Accounts payable and accrued liabilities - Accounts payable and accrued liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accrued liabilities:
Employee benefits	$ 10,712	$ 10,489
Deferred revenue	559	243
Insurance	289	255
Taxes other than on income	285	279
Advances from customers	267	298
Customer tooling	145	135
Other	340	382
Total accounts payable and accrued liabilities	15,745	15,618
Security Products
Accounts payable:
Accounts payable	2,514	2,663
Marine Components
Accounts payable:
Accounts payable	$ 634	$ 874