Note 2 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Jul. 31, 2022
Mineral Rights, Databases [Member]
Mineral Property, Useful Life (Year)	5 years
Plant and Processing Facilities [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Plant and Processing Facilities [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	21 years
Mining and logging equipment and vehicles [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Mining and logging equipment and vehicles [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Building [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years