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Inventories - Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Inventory [Line Items]    
Total raw materials $ 2,807 $ 3,393
Total work-in-process 9,346 10,271
Total finished goods 2,945 3,199
Total inventories, net 15,098 16,863
Security Products    
Inventory [Line Items]    
Total raw materials 2,426 2,805
Total work-in-process 7,732 8,889
Total finished goods 2,041 2,331
Marine Components    
Inventory [Line Items]    
Total raw materials 381 588
Total work-in-process 1,614 1,382
Total finished goods $ 904 $ 868