Discontinued operations - Mexico project development - Financial Information (Details) - USD ($)	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Discontinued operations - Mexico project development
Loss from discontinued operations	$ (43,042)	$ (133,081)
Gain on sale of land and project documentation	$ (57,205)	$ 28,435

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Name:	us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration