Note 8 - Net Loss Per Share - Components of Reconciliation of Numerators and Denominators Net Loss Per Share (Details) - USD ($)	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Net loss (numerator)	$ (3,310,020)	$ (410,135)
Shares (denominator) (in shares)	7,536,561	6,667,595
Basic and diluted net loss per share (in dollars per share)	$ (0.44)	$ (0.06)