Summary of significant accounting policies (Details)	3 Months Ended
	Jan. 31, 2026 USD ($) shares	Jan. 31, 2025 shares	Jan. 31, 2026 EUR (€)	Oct. 31, 2025 USD ($)
Summary of significant accounting policies [Abstract]
Producing gas and oil royalty rights, net of amortization | $	$ 1			$ 1
Cash held at bank	$ 17,785		€ 15,000
Number of units of beneficial interest outstanding (in Units) | shares	9,190,590	9,190,590