Note 7 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Jul. 31, 2022
Cost	$ 26,604	$ 26,335
Accumulated Depreciation	(6,827)	(6,101)
Net Book Value	19,777	20,234
Plant and Processing Facilities [Member]
Cost	19,118	18,964
Accumulated Depreciation	(1,824)	(1,306)
Net Book Value	17,294	17,658
Mining Equipment [Member]
Cost	2,804	2,777
Accumulated Depreciation	(2,457)	(2,382)
Net Book Value	347	395
Logging Equipment and Vehicles [Member]
Cost	2,747	2,666
Accumulated Depreciation	(1,946)	(1,851)
Net Book Value	801	815
Computer Equipment [Member]
Cost	368	360
Accumulated Depreciation	(338)	(313)
Net Book Value	30	47
Furniture and Fixtures [Member]
Cost	190	190
Accumulated Depreciation	(179)	(177)
Net Book Value	11	13
Buildings [Member]
Cost	297	298
Accumulated Depreciation	(83)	(72)
Net Book Value	214	226
Land [Member]
Cost	1,080	1,080
Accumulated Depreciation	0	0
Net Book Value	$ 1,080	$ 1,080