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OTHER LONG-TERM LIABILITIES - Assumptions (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Retirement Indemnity Plans, France [Member]
Discount rate	0.60%	0.90%
Salary increase	2.50%	2.50%
Retirement age	65	65
Average retirement remaining service period	24	24
Defined Benefit Retirement Indemnity Plans, Japan [Member]
Discount rate	0.60%	0.60%
Salary increase	2.50%	2.50%
Retirement age	60	60
Average retirement remaining service period	14	14

X

- Definition

The average retirement remaining service period used to calculation for the time value of money for the plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	edap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The retirement age to calculate for the time value of money for the plan.

+ References

No definition available.

+ Details

Name:	edap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge
Namespace Prefix:	edap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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: