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Subsequent events (Details Narrative) - USD ($)
$ in Millions
1 Months Ended
Apr. 30, 2023
Dec. 31, 2022
Subsequent Event [Line Items]    
Investments   $ 0.5
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Consideration amount $ 1.2  
Subsequent Event [Member] | Construction Management Agreement [Member]    
Subsequent Event [Line Items]    
Payments to acquire mining assets $ 1.6