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Note 8 - Operating Lease Right-of-use Assets - Operating Lease Right-of-use Assets (Details) - EUR (€) € in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Operating Lease, Right-of-Use Asset | € 2,647 |
Operating Lease Arrangement, Facilities [Member] |  |
Operating Lease, Right-of-Use Asset | 2,387 |
Operating Lease Arrangement, Equipment [Member] |  |
Operating Lease, Right-of-Use Asset | 58 |
Operating Lease Arrangement, Furniture, Fixture, and Fittings and Other [Member] |  |
Operating Lease, Right-of-Use Asset | € 202 |

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_LeaseContractualTermAxis=edap_OperatingLeaseArrangementFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LeaseContractualTermAxis=edap_OperatingLeaseArrangementEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LeaseContractualTermAxis=edap_OperatingLeaseArrangementFurnitureFixtureAndFittingsAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |