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Note 10 - Derivative Instruments (Details Textual) - USD ($) $ in Millions	Aug. 15, 2024	Jan. 10, 2019	Dec. 31, 2024	Dec. 31, 2023	Jan. 03, 2023
Metal Swaps [Member]
Derivative, Notional Amount			$ 3.5	$ 5.2
Forward Interest Rate Hedge [Member]
Derivative, Notional Amount	$ 75.0
Derivative, Term of Contract (Year)	2 years
Derivative, Fixed Interest Rate	3.82%
Interest Rate Swap [Member]
Derivative, Notional Amount		$ 75.0
Derivative, Term of Contract (Year)		5 years
Derivative, Fixed Interest Rate		2.57%			2.42%
Derivative Asset			$ 0.3	$ 0.1

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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+ Details

Name:	us-gaap_DerivativeAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Period the derivative contract is outstanding, 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_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=zeus_ForwardInterestRateHedgeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: