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Inventories, net - Inventories, net (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Inventory [Line Items]    
Total raw materials $ 5,700 $ 5,738
Total work-in-process 17,430 19,042
Total finished goods 4,878 5,932
Total inventories, net 28,008 30,712
Security Products    
Inventory [Line Items]    
Total raw materials 4,178 3,569
Total work-in-process 12,880 13,879
Total finished goods 2,801 3,175
Marine Components    
Inventory [Line Items]    
Total raw materials 1,522 2,169
Total work-in-process 4,550 5,163
Total finished goods $ 2,077 $ 2,757