Note 13 - Capital Stock - Continuity Schedule of Outstanding Share Purchase Warrants (Details) - $ / shares	3 Months Ended
	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021
Balance, Number of Warrants (in shares)	4,322,624	4,895,474	5,387,323
Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.90	$ 1.91	$ 1.90
Exercised, Number of Warrants (in shares)	(339,845)	(572,850)	(491,849)
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 1.80	$ 1.99	$ 1.85
Balance, Number of Warrants (in shares)	3,982,779	4,322,624	4,895,474
Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.91	$ 1.90	$ 1.91