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Inventories, Net - Inventories, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Inventory [Line Items]    
Total raw materials $ 2,840 $ 2,807
Total work-in-process 9,046 9,346
Total finished goods 2,533 2,945
Total inventories, net 14,419 15,098
Security Products    
Inventory [Line Items]    
Total raw materials 2,473 2,426
Total work-in-process 7,601 7,732
Total finished goods 1,784 2,041
Marine Components    
Inventory [Line Items]    
Total raw materials 367 381
Total work-in-process 1,445 1,614
Total finished goods $ 749 $ 904