Note 9 - Net Loss Per Share - Components of Reconciliation of Numerators and Denominators Net Loss Per Share (Details) - USD ($)	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Net loss (numerator)	$ (2,591,888)	$ (3,310,020)
Shares (denominator) (in shares)	7,322,195	7,536,561
Basic and diluted net loss per share (in dollars per share)	$ (0.35)	$ (0.44)