Note 20 - Related-party Transactions (Details Textual) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Cleveland Warehouse [Member]
Lessee, Operating Lease, Number of Renewal Term	2
Lessee, Operating Lease, Renewal Term (Year)	5 years
Chief Executive Officer [Member] \| Related Entity That Owns Cleveland Warehouse [Member] \| Cleveland Warehouse [Member]
Equity Method Investment, Ownership Percentage	50.00%
Affiliated Entity [Member] \| Cleveland Warehouse [Member]
Operating Lease, Annual Expense	$ 0.2
Lessee, Operating Lease, Renewal Term (Year)	5 years

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

+ Details

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

- Definition

Represents the number of lessee's operating lease renewal.

+ References

No definition available.

+ Details

Name:	zeus_LesseeOperatingLeaseNumberOfRenewalTerm
Namespace Prefix:	zeus_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of annual expense for operating lease.

+ References

No definition available.

+ Details

Name:	zeus_OperatingLeaseAnnualExpense
Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=zeus_RelatedEntityThatOwnsClevelandWarehouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: