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Trade Receivables and Other Current Assets and Receivables - Trade Receivables (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Trade Receivables and Other Current Assets and Receivables [Line Items]
Trade receivables	€ 48	€ 4	€ 6
Average payment period for trade receivables	30 days
3 months or less
Trade Receivables and Other Current Assets and Receivables [Line Items]
Trade receivables	€ 48	€ 4	€ 6

X

- Definition

The amount of current trade receivables. [Refer: Trade receivables]

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X

- Definition

Represents the average payment period for trade receivables.

+ References

No definition available.

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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