Note 6 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)	Jul. 31, 2019	Jul. 31, 2018
Cost	$ 12,693,479	$ 12,897,160
Accumulated Depreciation	(5,651,120)	(5,795,608)
Net Book Value	7,042,359	7,101,552
Hobson Processing Facility [Member]
Cost	6,642,835	6,819,088
Accumulated Depreciation	(773,933)	(773,933)
Net Book Value	5,868,902	6,045,155
Mining Equipment [Member]
Cost	2,467,557	2,438,681
Accumulated Depreciation	(2,402,681)	(2,412,277)
Net Book Value	64,876	26,404
Logging Equipment and Vehicles [Member]
Cost	1,950,229	1,971,742
Accumulated Depreciation	(1,730,905)	(1,850,306)
Net Book Value	219,324	121,436
Computer Equipment [Member]
Cost	572,551	607,342
Accumulated Depreciation	(546,652)	(577,584)
Net Book Value	25,899	29,758
Furniture and Fixtures [Member]
Cost	170,701	170,701
Accumulated Depreciation	(169,379)	(168,814)
Net Book Value	1,322	1,887
Land and Building [Member]
Cost	889,606	889,606
Accumulated Depreciation	(27,570)	(12,694)
Net Book Value	$ 862,036	$ 876,912