Subsequent events (Details) - $ / gal		12 Months Ended
Mar. 08, 2022	Dec. 31, 2021
Subsequent events [Abstract]
Oil and Gas, Average Sale Price	100	75

Sales price per unit of oil and gas produced.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204
-Paragraph (b)
-Subparagraph (1)

Name:	srt_AverageSalesPrices
Namespace Prefix:	srt_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration