Note 15 - Supplemental Cash Flow Information (Details Textual) - USD ($)	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Stock Issued During Period, Shares, Issued for Services	29,167	30,845
Stock Issued During Period, Value, Issued for Services	$ 31,792	$ 50,713
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total	223,362	239,255
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 408,889	$ 408,889
Certain Management, Employees and Consultants of the Company [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total	435,348	141,546
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total	$ 410,462	$ 239,255