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Share capital - Stock Options Outstanding and Exercisable (Details)	6 Months Ended
	Jan. 31, 2026 $ / shares shares	Jan. 31, 2026 $ / shares shares	Jul. 31, 2025 $ / shares shares	Nov. 06, 2024 shares	Oct. 31, 2024 $ / shares shares	Jul. 31, 2024 $ / shares shares
Share capital [Abstract]
Outstanding (in Shares)	108,644	108,644	108,644	58,644	62,772	62,772
Outstanding (in Dollars per share) \| $ / shares	$ 23.1		$ 22.79		$ 40.2	$ 40.2
Exercisable (in Shares)	57,956	57,956	51,859
Exercise Price Range One [Member]
Share capital [Abstract]
Outstanding (in Shares)	2,676	2,676
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Jan. 17, 2028
Exercisable (in Shares)	2,676	2,676
Exercise Price Range Two [Member]
Share capital [Abstract]
Outstanding (in Shares)	9,176	9,176
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Feb. 06, 2028
Exercisable (in Shares)	9,176	9,176
Exercise Price Range Three [Member]
Share capital [Abstract]
Outstanding (in Shares)	8,411	8,411
Outstanding (in Dollars per share) \| $ / shares		$ 72.6
Expiry date	May 15, 2028
Exercisable (in Shares)	7,723	7,723
Exercise Price Range Four [Member]
Share capital [Abstract]
Outstanding (in Shares)	764	764
Outstanding (in Dollars per share) \| $ / shares		$ 77.2
Expiry date	Jun. 26, 2028
Exercisable (in Shares)	764	764
Exercise Price Range Five [Member]
Share capital [Abstract]
Outstanding (in Shares)	50,000	50,000
Outstanding (in Dollars per share) \| $ / shares		$ 2.32
Expiry date	Mar. 26, 2030
Exercisable (in Shares)	0	0
Exercise Price Range Six [Member]
Share capital [Abstract]
Outstanding (in Shares)	22,938	22,938
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Jan. 17, 2032
Exercisable (in Shares)	22,938	22,938
Exercise Price Range Seven [Member]
Share capital [Abstract]
Outstanding (in Shares)	4,588	4,588
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Mar. 01, 2032
Exercisable (in Shares)	4,588	4,588
Exercise Price Range Eight [Member]
Share capital [Abstract]
Outstanding (in Shares)	917	917
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Mar. 14, 2032
Exercisable (in Shares)	917	917
Exercise Price Range Nine [Member]
Share capital [Abstract]
Outstanding (in Shares)	7,646	7,646
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Oct. 12, 2032
Exercisable (in Shares)	7,646	7,646
Exercise Price Range Ten [Member]
Share capital [Abstract]
Outstanding (in Shares)	1,528	1,528
Outstanding (in Dollars per share) \| $ / shares		$ 52.4
Expiry date	Feb. 06, 2033
Exercisable (in Shares)	1,528	1,528