Note 13 - Capital Stock - Continuity Schedule of Outstanding Share Purchase Warrants (Details) - $ / shares	3 Months Ended	6 Months Ended
	Oct. 31, 2022	Jan. 31, 2023
Balance, Number of Warrants (in shares)	3,615,454	3,615,454
Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.92	$ 1.92
Issuance of Replacement Warrants (Note 3,12), Number of Warrants (in shares)	4,660,580
Issuance of Replacement Warrants (Note 3,12), Weighted Average Exercise Price (in dollars per share)	$ 2.84
Exercised, Number of Warrants (in shares)	(3,410,898)	(45,000)
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 1.80	$ 1.46
Expired, Number of Warrants (in shares)	(27,550)
Expired, Weighted Average Exercise Price (in dollars per share)	$ 1.80
Balance, Number of Warrants (in shares)	4,837,586	4,792,586
Balance, Weighted Average Exercise Price (in dollars per share)	$ 2.85	$ 2.93