v3.26.1
Material Accounting Policies - Disclosure of principal subsidiaries (Details)
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Minera Canam S.A. de C.V. [Member]    
Disclosure of subsidiaries [Line items]    
Country of incorporation and operation Mexico  
Functional currency USD  
Ownership interest 100.00% 100.00%
Goanna Resources, S.A.P.I. de C.V.[Member]    
Disclosure of subsidiaries [Line items]    
Country of incorporation and operation Mexico  
Functional currency USD  
Ownership interest 100.00% 100.00%
Sinaloa Minerals Explorations S.A. de C.V. [Member]    
Disclosure of subsidiaries [Line items]    
Country of incorporation and operation Mexico  
Functional currency USD  
Ownership interest 100.00% 0.00%
Panuco Silver Resources S.A. de C.V. [Member]    
Disclosure of subsidiaries [Line items]    
Country of incorporation and operation Mexico  
Functional currency USD  
Ownership interest 100.00% 0.00%
Plata Fuerte S.A. de C.V. [Member]    
Disclosure of subsidiaries [Line items]    
Country of incorporation and operation Mexico  
Functional currency USD  
Ownership interest 100.00% 0.00%