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Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets, Net (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets, Net [Line Items]    
Customer Relationships, Accumulated Amortization $ (3,333)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ (3,111)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Gross Carrying Amount 36,757zeus_FiniteAndIndefiniteLivedIntangibleAssetsGross 36,757zeus_FiniteAndIndefiniteLivedIntangibleAssetsGross
Accumulated Amortization (3,333)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (3,111)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible Assets, Net 33,424us-gaap_IntangibleAssetsNetExcludingGoodwill 33,646us-gaap_IntangibleAssetsNetExcludingGoodwill
Trade Names [Member]    
Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets, Net [Line Items]    
Trade Name, Gross Carrying Amount 23,425us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
23,425us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Trade Name, Intangible Assets, Net 23,425us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
23,425us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Customer Relationships [Member]    
Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets, Net [Line Items]    
Customer Relationships, Gross Carrying Amount 13,332us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
13,332us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Customer Relationships, Accumulated Amortization (3,333)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
(3,111)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Customer Relationships, Intangible Assets, Net 9,999us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
10,221us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Accumulated Amortization $ (3,333)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
$ (3,111)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember