CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - EUR (€) € in Thousands	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Property and equipment, accumulated depreciation	€ 498	€ 475
Shareholders' Deficit
Common stock, par value	€ 0.01	€ 0.01
Common stock, shares authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	303,757,622	303,757,622
Common stock, shares outstanding	303,757,622	303,757,622
Preferred stock, par value	€ 0.01	€ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0