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Note 6 - Derivative Instruments (Details) (USD $) | 3 Months Ended |
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Mar. 31, 2015 | Jun. 30, 2012
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Fixed Interest Rate | 1.21%us-gaap_DerivativeFixedInterestRate |
Cash Flow Hedging [Member] | Minimum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative Premium Rate | 1.75%zeus_DerivativePremiumRate / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Cash Flow Hedging [Member] | Maximum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative Premium Rate | 1.25%zeus_DerivativePremiumRate / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Cash Flow Hedging [Member] | Interest Rate Swap [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Long-term Line of Credit (in Dollars) | $ 37,900,000 us-gaap_LineOfCredit / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |
Fixed Rate Interest Hedge, Notional Monthly Decrease (in Dollars) | 729,000 zeus_FixedRateInterestHedgeNotionalMonthlyDecrease / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |
Cash Flow Hedging [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Fixed Interest Rate | 1.21%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |
Nickel Swaps [Member] | Minimum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 1 month |
Nickel Swaps [Member] | Maximum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 14 months |
Carbon Swaps [Member] | Prepaid Expenses and Other Current Assets [Member] | Minimum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 1 month |
Carbon Swaps [Member] | Prepaid Expenses and Other Current Assets [Member] | Maximum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 9 months |
Carbon Swaps [Member] | Minimum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 1 month |
Carbon Swaps [Member] | Maximum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative, Remaining Maturity | 9 months |
ABL Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Long-term Line of Credit (in Dollars) |  | 53,200,000 us-gaap_LineOfCredit / us-gaap_LineOfCreditFacilityAxis = zeus_ABLCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = zeus_TermLoanMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
Minimum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative Premium Rate | 1.75%zeus_DerivativePremiumRate / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Derivative Premium Rate | 2.25%zeus_DerivativePremiumRate / us-gaap_RangeAxis = us-gaap_MaximumMember |
Interest Rate Swap [Member] |  |
Note 6 - Derivative Instruments (Details) [Line Items] |  |
Long-term Line of Credit (in Dollars) | 37,900,000 us-gaap_LineOfCredit / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Fixed Rate Interest Hedge, Notional Monthly Decrease (in Dollars) | $ 729,000 zeus_FixedRateInterestHedgeNotionalMonthlyDecrease / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeRemainingMaturity1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The premium rate of a derivative instrument. + References No definition available. + Details
Name: | zeus_DerivativePremiumRate
Namespace Prefix: | zeus_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The amount by which a fixed rate interest hedge notional amount is decreased on a monthly basis. + References No definition available. + Details
Name: | zeus_FixedRateInterestHedgeNotionalMonthlyDecrease
Namespace Prefix: | zeus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | zeus_Note6DerivativeInstrumentsDetailsLineItems
Namespace Prefix: | zeus_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DerivativeByNatureAxis=zeus_CarbonSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeByNatureAxis=zeus_NickelSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LineOfCreditFacilityAxis=zeus_ABLCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |