CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' DEFICIT (UNAUDITED) - EUR (€) € in Thousands	Total	Common Stock	APIC	Accumulated Deficit	Accumulated Other Comprehensive Income
Balance, shares at Dec. 31, 2021		303,757,622
Balance, amount at Dec. 31, 2021	€ (60,086)	€ 2,530	€ 34,443	€ (97,750)	€ 691
Net loss	(1,211)	0	0	(1,211)	0
Translation adjustment	7	€ 0	0	0	7
Balance, shares at Mar. 31, 2022		303,757,622
Balance, amount at Mar. 31, 2022	(61,290)	€ 2,530	34,443	(98,961)	698
Balance, shares at Dec. 31, 2021		303,757,622
Balance, amount at Dec. 31, 2021	(60,086)	€ 2,530	34,443	(97,750)	691
Net loss	(3,898)
Balance, shares at Sep. 30, 2022		303,757,622
Balance, amount at Sep. 30, 2022	(63,986)	€ 2,530	34,443	(101,648)	689
Balance, shares at Mar. 31, 2022		303,757,622
Balance, amount at Mar. 31, 2022	(61,290)	€ 2,530	34,443	(98,961)	698
Net loss	(1,342)	0	0	(1,342)	0
Translation adjustment	(2)	€ 0	0	0	(2)
Balance, shares at Jun. 30, 2022		303,757,622
Balance, amount at Jun. 30, 2022	(62,634)	€ 2,530	34,443	(100,303)	696
Net loss	(1,345)	0	0	(1,345)	0
Translation adjustment	(7)	€ 0	0	0	(7)
Balance, shares at Sep. 30, 2022		303,757,622
Balance, amount at Sep. 30, 2022	(63,986)	€ 2,530	34,443	(101,648)	689
Balance, shares at Dec. 31, 2022		303,757,622
Balance, amount at Dec. 31, 2022	(64,896)	€ 2,530	34,443	(102,555)	686
Net loss	(1,861)	0	0	(1,861)	0
Translation adjustment	0	€ 0	0	0	0
Balance, shares at Mar. 31, 2023		303,757,622
Balance, amount at Mar. 31, 2023	(66,757)	€ 2,530	34,443	(104,416)	698
Balance, shares at Dec. 31, 2022		303,757,622
Balance, amount at Dec. 31, 2022	(64,896)	€ 2,530	34,443	(102,555)	686
Net loss	(10,660)
Balance, shares at Sep. 30, 2023		303,757,622
Balance, amount at Sep. 30, 2023	(75,570)	€ 2,530	34,443	(113,215)	672
Balance, shares at Mar. 31, 2023		303,757,622
Balance, amount at Mar. 31, 2023	(66,757)	€ 2,530	34,443	(104,416)	698
Net loss	(7,685)	0	0	(7,685)	0
Translation adjustment	(9)	€ 0	0	0	(9)
Balance, shares at Jun. 30, 2023		303,757,622
Balance, amount at Jun. 30, 2023	(74,451)	€ 2,530	34,443	(112,101)	677
Net loss	(1,114)	0	0	(1,114)	0
Translation adjustment	(5)	€ 0	0	0	(5)
Balance, shares at Sep. 30, 2023		303,757,622
Balance, amount at Sep. 30, 2023	€ (75,570)	€ 2,530	€ 34,443	€ (113,215)	€ 672