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Note 15 - Other Long-term Liabilities (Details Textual) - EUR (€) € in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Retirement Indemnity Plans, France [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	€ 692	€ 627
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total	4
Defined Benefit Retirement Indemnity Plans, Japan [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	960	€ 872
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total	€ 26

X

- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=edap_DefinedBenefitRetirementIndemnityPlansFranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=edap_DefinedBenefitRetirementIndemnityPlansJapanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: