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Accounts Receivable, net - Schedule of Account Receivable, net (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Accounts Receivable Net [Line Items]    
Allowance for doubtful accounts $ (163) $ (216)
Total accounts receivable, net 10,741 8,480
Security Products [Member]
   
Accounts Receivable Net [Line Items]    
Accounts receivable, gross 9,741 7,952
Marine Components [Member]
   
Accounts Receivable Net [Line Items]    
Accounts receivable, gross $ 1,163 $ 744