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OTHER LONG-TERM LIABILITIES (Details) - EUR (€) € in Thousands	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Retirement Indemnity Plans, France [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	€ 800	€ 693
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total	1
Defined Benefit Retirement Indemnity Plans, Japan [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	1,134	€ 1,062
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total	€ 1

X

- Definition

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

+ 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 (e)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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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/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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