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Note 12 - Subsequent Events (Details Textual)	1 Months Ended			9 Months Ended
	Nov. 30, 2020 USD ($) shares	Oct. 31, 2020 USD ($)	Nov. 30, 2019	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Proceeds from Sale of Property, Plant, and Equipment, Total				$ 9,752,649
Synergy Keelung, Synergy Oakland, Synergy Busan and Synergy Antwerp [Member]
Number of Vessels Acquired			4
Subsequent Event [Member] | MV EM Athens [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total		$ 4,900,000
Repayments of Debt		$ 3,750,000
Subsequent Event [Member] | Synergy Keelung, Synergy Oakland, Synergy Busan and Synergy Antwerp [Member]
Stock Issued During Period, Value, Vessel Acquisition, Per Vessel	$ 0.50
Stock Issued During Period, Shares, Vessel Acquisition (in shares) | shares	161,357

X

- Definition

The number of vessels acquired during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	esea_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Shares issued during the period for vessel acquisitions during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	esea_
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X

- Definition

The amount of stock issued during the period for vessel acquisition per each vessel.

+ References

No definition available.

+ Details

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Namespace Prefix:	esea_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

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X

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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- Details

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