Details of the Statements of Profit or Loss and Other Comprehensive Income (Revenues) (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Details Of Statements Of Profit Or Loss And Other Comprehensive Income Loss [Abstract]
Revenues from the sale of solar electricity	€ 31,081	€ 2,577	€ 13,069
Revenues from the sale of gas and power produced by anaerobic digestion plants	12,686	6,002	4,786
Revenues from concessions project	1,016	1,066	1,133
Total Revenues	€ 44,783	€ 9,645	€ 18,988

The amount of revenue arising from the sale of oil and gas products. [Refer: Revenue]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration