Note 14 - Capital Stock - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares	3 Months Ended
	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020
Nonvested balance (in shares)	5,036,157	6,078,716	6,797,471
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.45	$ 0.46	$ 0.46
Vested (in shares)	(229,229)	(1,042,559)	(718,755)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.46	$ 0.48	$ 0.46
Granted, number of stock options (in shares)	42,490
Granted, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 1.29
Nonvested balance (in shares)	4,849,418	5,036,157	6,078,716
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)	$ 0.46	$ 0.45	$ 0.46