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Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Deferred Tax Liability From Fixed Interest Rate Hedge	$ (645)
Income Taxes Paid, Net, Total	1,000	$ 500	$ 11,300
Deferred Tax Assets, Valuation Allowance, Total	2,302	2,215
State and Local Jurisdiction [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 2,300	$ 2,200

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586

+ Details

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X

- Definition

The amount of increase (decrease) in deferred tax liability from fixed interest rate hedge.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	xbrli:monetaryItemType
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: