Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Jul. 31, 2020	Jul. 31, 2019
Cost	$ 12,571,933	$ 12,693,479
Accumulated Depreciation	(5,552,116)	(5,651,120)
Net Book Value	7,019,817	7,042,359
Hobson Processing Facility [Member]
Cost	6,642,835	6,642,835
Accumulated Depreciation	(773,933)	(773,933)
Net Book Value	5,868,902	5,868,902
Mining Equipment [Member]
Cost	2,393,579	2,467,557
Accumulated Depreciation	(2,342,518)	(2,402,681)
Net Book Value	51,061	64,876
Logging Equipment and Vehicles [Member]
Cost	1,924,969	1,950,229
Accumulated Depreciation	(1,736,806)	(1,730,905)
Net Book Value	188,163	219,324
Computer Equipment [Member]
Cost	550,243	572,551
Accumulated Depreciation	(486,467)	(546,652)
Net Book Value	63,776	25,899
Furniture and Fixtures [Member]
Cost	170,701	170,701
Accumulated Depreciation	(169,946)	(169,379)
Net Book Value	755	1,322
Land and Building [Member]
Cost	889,606	889,606
Accumulated Depreciation	(42,446)	(27,570)
Net Book Value	$ 847,160	$ 862,036