1. The Company and Summary of Significant Accounting Policies (Details Narrative) - EUR (€) € in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accumulated deficit	€ (94,266)		€ (93,020)
Current liabilities exceeding current assets	€ (63,291)
Weighted average number of shares outstanding, basic and diluted	303,757,622	303,757,622
Preferred stock, shares authorized	5,000,000		5,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Professional fees incurred and paid to a related party	€ 6	€ 11
Grant Revenue \| One Partner
Concentration risk	94.00%	98.00%	95.00%
Convertible Loans
Potential number of shares issuable	712,980,875	676,381,197
Stock Options Granted to Employees
Potential number of shares issuable	25,750,000	26,750,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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