Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Oct. 31, 2019	Jul. 31, 2019
Cost	$ 12,720,306	$ 12,693,479
Accumulated Depreciation	(5,676,306)	(5,651,120)
Net Book Value	7,044,000	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	2,472,297	2,467,557
Accumulated Depreciation	(2,407,572)	(2,402,681)
Net Book Value	64,725	64,876
Logging Equipment and Vehicles [Member]
Cost	1,970,124	1,950,229
Accumulated Depreciation	(1,743,359)	(1,730,905)
Net Book Value	226,765	219,324
Computer Equipment [Member]
Cost	574,743	572,551
Accumulated Depreciation	(550,632)	(546,652)
Net Book Value	24,111	25,899
Furniture and Fixtures [Member]
Cost	170,701	170,701
Accumulated Depreciation	(169,522)	(169,379)
Net Book Value	1,179	1,322
Land and Building [Member]
Cost	889,606	889,606
Accumulated Depreciation	(31,288)	(27,570)
Net Book Value	$ 858,318	$ 862,036