Note 13 - Capital Stock - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares	3 Months Ended
	Jan. 31, 2022	Oct. 31, 2021
Nonvested balance (in shares)	3,635,780	3,891,207
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.64	$ 0.66
Granted, number of stock options (in shares)		10,000
Granted, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 1.73
Vested (in shares)	(1,069,948)	(265,427)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.55	$ 0.87
Nonvested balance (in shares)	2,565,832	3,635,780
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.68	$ 0.64