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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
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

X

- 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

X

- Details

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

X

- Details

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

X

- Details

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