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Note 3 - Revenue Recognition - Disaggregation of Revenues, Percentage (Details)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Specialty	100.00%	100.00%
Specialty [Member]
Specialty	29.10%	28.50%
Hot Rolled Products [Member]
Specialty	27.30%	30.30%
Tube Products [Member]
Specialty	16.90%	16.80%
Plate Products [Member]
Specialty	13.50%	13.30%
Cold Rolled Products [Member]
Specialty	3.40%	5.00%
Coated Products [Member]
Specialty	4.40%	5.00%
Product and Service, Other [Member]
Specialty	5.40%	1.10%
Specialty Metals Flat Products [Member]
Specialty	29.10%	28.60%
Specialty Metals Flat Products [Member] | Specialty [Member]
Specialty	29.10%	28.50%
Specialty Metals Flat Products [Member] | Hot Rolled Products [Member]
Specialty	0.00%	0.00%
Specialty Metals Flat Products [Member] | Tube Products [Member]
Specialty	0.00%	0.00%
Specialty Metals Flat Products [Member] | Plate Products [Member]
Specialty	0.00%	0.00%
Specialty Metals Flat Products [Member] | Cold Rolled Products [Member]
Specialty	0.00%	0.00%
Specialty Metals Flat Products [Member] | Coated Products [Member]
Specialty	0.00%
Specialty Metals Flat Products [Member] | Product and Service, Other [Member]
Specialty	0.00%	0.10%
Carbon Flat Products [Member]
Specialty	54.00%	54.60%
Carbon Flat Products [Member] | Specialty [Member]
Specialty	0.00%	0.00%
Carbon Flat Products [Member] | Hot Rolled Products [Member]
Specialty	27.30%	30.30%
Carbon Flat Products [Member] | Tube Products [Member]
Specialty	0.00%	0.00%
Carbon Flat Products [Member] | Plate Products [Member]
Specialty	13.50%	13.30%
Carbon Flat Products [Member] | Cold Rolled Products [Member]
Specialty	3.40%	5.00%
Carbon Flat Products [Member] | Coated Products [Member]
Specialty	4.40%	5.00%
Carbon Flat Products [Member] | Product and Service, Other [Member]
Specialty	5.40%	1.00%
Tubular and Pipe Products [Member]
Specialty	16.90%	16.80%
Tubular and Pipe Products [Member] | Specialty [Member]
Specialty	0.00%	0.00%
Tubular and Pipe Products [Member] | Hot Rolled Products [Member]
Specialty	0.00%	0.00%
Tubular and Pipe Products [Member] | Tube Products [Member]
Specialty	16.90%	16.80%
Tubular and Pipe Products [Member] | Plate Products [Member]
Specialty	0.00%	0.00%
Tubular and Pipe Products [Member] | Cold Rolled Products [Member]
Specialty	0.00%	0.00%
Tubular and Pipe Products [Member] | Coated Products [Member]
Specialty	0.00%	0.00%
Tubular and Pipe Products [Member] | Product and Service, Other [Member]
Specialty	0.00%	0.00%

X

- Definition

Percentage of revenue, including tax collected from customer, from satisfaction of performance obligation by transferring promised good or service to customer.

+ References

No definition available.

+ Details

Name:	zeus_RevenueFromContractWithCustomerIncludingAssessedTaxPercentage
Namespace Prefix:	zeus_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_SpecialtyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_HotRolledProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_TubeProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_PlateProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_ColdRolledProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=zeus_CoatedProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ProductAndServiceOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=zeus_SpecialtyMetalsFlatProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=zeus_CarbonFlatProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=zeus_TubularAndPipeProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: