Note 6 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Apr. 30, 2021	Jul. 31, 2020
Cost	$ 12,818,057	$ 12,571,933
Accumulated Depreciation	(5,418,691)	(5,552,116)
Net Book Value	7,399,366	7,019,817
Hobson Processing Facility [Member]
Cost	6,642,835	6,642,835
Accumulated Depreciation	(831,789)	(773,933)
Net Book Value	5,811,046	5,868,902
Mining Equipment [Member]
Cost	2,355,379	2,393,579
Accumulated Depreciation	(2,314,364)	(2,342,518)
Net Book Value	41,015	51,061
Logging Equipment and Vehicles [Member]
Cost	1,923,983	1,924,969
Accumulated Depreciation	(1,761,956)	(1,736,806)
Net Book Value	162,027	188,163
Computer Equipment [Member]
Cost	333,318	550,243
Accumulated Depreciation	(285,517)	(486,467)
Net Book Value	47,801	63,776
Furniture and Fixtures [Member]
Cost	184,941	170,701
Accumulated Depreciation	(171,462)	(169,946)
Net Book Value	13,479	755
Land and Building [Member]
Cost	1,377,601	889,606
Accumulated Depreciation	(53,603)	(42,446)
Net Book Value	$ 1,323,998	$ 847,160