Note 15 - Supplemental Cash Flow Information (Details Textual) - USD ($)	3 Months Ended				6 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jan. 31, 2019	Oct. 31, 2018	Jan. 31, 2020	Jan. 31, 2019
Stock Issued During Period, Shares, Issued for Services					342,368	129,706
Stock Issued During Period, Value, Issued for Services					$ 309,749	$ 178,454
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total	$ 234,792	$ 223,362	$ 290,238	$ 239,255
Stock Issued During Period, Shares, Credit Facility	1,743,462
Stock Issued During Period, Value ,Credit Facility	$ 1,400,000		$ 1,400,000
Interest Paid, Excluding Capitalized Interest, Operating Activities					$ 817,778	$ 817,778
Certain Management, Employees and Consultants of the Company [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total					691,544	364,702
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total					$ 645,254	$ 529,492