Note 12 - Capital Stock - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares		3 Months Ended
	Aug. 07, 2019	Jan. 31, 2020	Oct. 31, 2019
Nonvested balance (in shares)		3,262,700	3,310,600
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.57	$ 0.59
Granted (in shares)	597,650		597,650
Granted, Weighted Average Grant-Date Fair Value (in dollars per share)			$ 0.51
Vested (in shares)		(806,534)	(645,550)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.62	$ 0.61
Forfeited (in shares)		(21,875)
Forfeited (in dollars per share)		$ 0.59
Nonvested balance (in shares)		2,434,291	3,262,700
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share)		$ 0.55	$ 0.57