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OTHER LONG-TERM LIABILITIES - Provision Presentation According to ASC 715 (Details) - EUR (€) € in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Defined Benefit Retirement Indemnity Plans, France [Member] |  |  |
Non-current liabilities | € 1,032 | € 960 |
Current liabilities | 80 | 10 |
Accumulated other comprehensive income (loss) | (111) | (67) |
Accrued pension cost | 1,000 | 903 | € 815
Defined Benefit Retirement Indemnity Plans, Japan [Member] |  |  |
Non-current liabilities | 1,241 | 1,207 |
Current liabilities | 69 | 22 |
Accumulated other comprehensive income (loss) | (130) | (136) |
Accrued pension cost | € 1,181 | € 1,093 | € 895

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