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Inventories, Net (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]    
Total raw materials $ 6,949 $ 6,757
Total work-in-process 7,477 7,437
Total finished goods 4,827 5,384
Total inventories, net 19,253 19,578
Security Products [Member]
   
Segment Reporting Information [Line Items]    
Total raw materials 2,332 2,510
Total work-in-process 5,583 5,778
Total finished goods 1,486 1,700
Furniture Components [Member]
   
Segment Reporting Information [Line Items]    
Total raw materials 3,651 3,314
Total work-in-process 1,408 1,260
Total finished goods 2,780 2,994
Marine Components [Member]
   
Segment Reporting Information [Line Items]    
Total raw materials 966 933
Total work-in-process 486 399
Total finished goods $ 561 $ 690