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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
LIFO debit (in Dollars) $ 3,207zeus_LIFODebit $ 3,572zeus_LIFODebit
Preferred stock, par value (in Dollars per share) $ 0us-gaap_PreferredStockParOrStatedValuePerShare $ 0us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 5,000us-gaap_PreferredStockSharesAuthorized 5,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in Dollars per share) $ 0us-gaap_CommonStockParOrStatedValuePerShare $ 0us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 20,000us-gaap_CommonStockSharesAuthorized 20,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 10,984us-gaap_CommonStockSharesIssued 10,984us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 10,964us-gaap_CommonStockSharesOutstanding 10,964us-gaap_CommonStockSharesOutstanding