Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued liabilities:
Employee benefits	$ 7,413	$ 7,644
Customer tooling	290	346
Taxes other than on income	289	300
Insurance	117	233
Professional	4	219
Sales rebates	135	140
Other	272	386
Total	10,792	11,882
Security Products
Accounts payable:
Accounts payable	1,897	2,271
Marine Components
Accounts payable:
Accounts payable	$ 375	$ 343