Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Jan. 31, 2020	Jul. 31, 2019
Cost	$ 12,623,387	$ 12,693,479
Accumulated Depreciation	(5,602,066)	(5,651,120)
Net Book Value	7,021,321	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	2,394,278	2,467,557
Accumulated Depreciation	(2,334,120)	(2,402,681)
Net Book Value	60,158	64,876
Logging Equipment and Vehicles [Member]
Cost	1,948,557	1,950,229
Accumulated Depreciation	(1,734,654)	(1,730,905)
Net Book Value	213,903	219,324
Computer Equipment [Member]
Cost	577,410	572,551
Accumulated Depreciation	(554,687)	(546,652)
Net Book Value	22,723	25,899
Furniture and Fixtures [Member]
Cost	170,701	170,701
Accumulated Depreciation	(169,663)	(169,379)
Net Book Value	1,038	1,322
Land and Building [Member]
Cost	889,606	889,606
Accumulated Depreciation	(35,009)	(27,570)
Net Book Value	$ 854,597	$ 862,036