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Document And Entity Information
 6 Months Ended
Jun. 30, 2017
shares
Document Information [Line Items]  
Entity Registrant Name EUROSEAS LTD.
Entity Central Index Key 0001341170
Trading Symbol esea
Current Fiscal Year End Date --12-31
Entity Filer Category Non-accelerated Filer
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Well-known Seasoned Issuer No
Entity Common Stock, Shares Outstanding (in shares) 11,173,856
Document Type 6-K
Document Period End Date Jun. 30, 2017
Document Fiscal Year Focus 2017
Document Fiscal Period Focus Q2
Amendment Flag false