Inventories, Net - Inventories, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Inventory [Line Items]
Total raw materials	$ 2,813	$ 2,807
Total work-in-process	8,832	9,346
Total finished goods	2,479	2,945
Total inventories, net	14,124	15,098
Security Products
Inventory [Line Items]
Total raw materials	2,444	2,426
Total work-in-process	7,518	7,732
Total finished goods	1,792	2,041
Marine Components
Inventory [Line Items]
Total raw materials	369	381
Total work-in-process	1,314	1,614
Total finished goods	$ 687	$ 904