Note 14 - Capital Stock - Continuity Schedule of Outstanding Share Purchase Warrants (Details) - $ / shares	3 Months Ended
	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020
Balance, Number of Warrants (in shares)	14,254,264	14,555,314	7,721,981
Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.93	$ 1.92	$ 2.03
Issued, Number of Warrants (in shares)	181,818		6,833,333
Issued, Weighted Average Exercise Price (in dollars per share)	$ 4.13		$ 1.80
Exercised, Number of Warrants (in shares)	(8,145,840)	(1,050)
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 1.99	$ 1.80
Expired, Number of Warrants (in shares)	(809,304)	(300,000)
Expired, Weighted Average Exercise Price (in dollars per share)	$ 2.05	$ 1.38
Balance, Number of Warrants (in shares)	5,480,938	14,254,264	14,555,314
Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.90	$ 1.93	$ 1.92