Accounts Receivable, Net - Schedule of Account Receivable, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts Receivable Net [Line Items]
Allowance for doubtful accounts	$ (128)	$ (216)
Accounts receivable	8,534	8,480
Security Products
Accounts Receivable Net [Line Items]
Accounts receivable, gross	7,813	7,952
Marine Components
Accounts Receivable Net [Line Items]
Accounts receivable, gross	$ 849	$ 744