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Equity Method Investments (Details) (USD $)
Dec. 31, 2010
May 24, 2010
May 24, 2010
Structural Soft, LLC [Member]
Feb. 01, 2010
Processed Metal Products [Member]
Membership interest, percentage     10.00% 31.00%
Equity method investment $ 1,345,000 $ 1,500,000