Note 7 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Jul. 31, 2021
Cost	$ 26,335	$ 12,811
Accumulated Depreciation	(6,101)	(5,453)
Net Book Value	20,234	7,358
Plant and Processing Facilities [Member]
Cost	18,964	6,643
Accumulated Depreciation	(1,306)	(851)
Net Book Value	17,658	5,792
Mining Equipment [Member]
Cost	2,777	2,355
Accumulated Depreciation	(2,382)	(2,313)
Net Book Value	395	42
Logging Equipment and Vehicles [Member]
Cost	2,666	1,924
Accumulated Depreciation	(1,851)	(1,775)
Net Book Value	815	149
Computer Equipment [Member]
Cost	360	326
Accumulated Depreciation	(313)	(284)
Net Book Value	47	42
Furniture and Fixtures [Member]
Cost	190	185
Accumulated Depreciation	(177)	(172)
Net Book Value	13	13
Buildings [Member]
Cost	298	298
Accumulated Depreciation	(72)	(58)
Net Book Value	226	240
Land [Member]
Cost	1,080	1,080
Accumulated Depreciation	0	0
Net Book Value	$ 1,080	$ 1,080