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NATURE OF BUSINESS - Acquisition and Purchase Agreements - Narrative (Details)
 12 Months Ended
Oct. 18, 2021
USD ($)
shares
Oct. 14, 2021
USD ($)
$ / oz
Apr. 15, 2021
USD ($)
$ / oz
shares
Dec. 31, 2021
USD ($)
May 10, 2021
USD ($)
Apr. 15, 2021
$ / shares
Dec. 15, 2020
USD ($)
Disclosure of detailed information about business combination [line items]              
Deferred consideration       $ 42,543,000      
South Arturo              
Disclosure of detailed information about business combination [line items]              
Proportion of ownership   40.00%          
Osgood Mining Company LLC Acquisition              
Disclosure of detailed information about business combination [line items]              
Cash     $ 23,000,000        
Shares issued (in shares) | shares     13,036,846        
Warrants to purchase of common shares (in shares) | shares     12,071,152        
Period following closing date     36 months        
Exercise price per common share (in per shares) | $ / shares           $ 3.64  
Contingent value rights , payment to waterton amount     $ 5,000,000.0        
Contingent value rights , additional payment to waterton amount     $ 5,000,000        
Period for change in price consecutive day     60 days        
Contingent price increase per ounce | $ / oz     2,000        
Transaction costs     $ 309,000        
Asset Exchange with Nevada Gold Mines LLC              
Disclosure of detailed information about business combination [line items]              
Contingent price increase per ounce | $ / oz   25          
Contingent consideration   $ 50,000,000          
Reimbursement amount   7,331,000          
Proceeds from shares issued   47,700,000          
Transaction costs   $ 3,289,000          
Christison Purchase Agreement              
Disclosure of detailed information about business combination [line items]              
Cash             $ 10,000,000
Christison Purchase Agreement | Premier              
Disclosure of detailed information about business combination [line items]              
Cash         $ 2,500,000   7,500,000
Christison Purchase Agreement | Common shares              
Disclosure of detailed information about business combination [line items]              
Equity interests of acquirer             $ 5,000,000
Christison Purchase Agreement | Common shares | Premier              
Disclosure of detailed information about business combination [line items]              
Equity interests of acquirer         $ 2,430,488    
Acquisition of Ruby Hill              
Disclosure of detailed information about business combination [line items]              
Cash $ 75,000,000            
Equity interests of acquirer $ 8,000,000            
Percentage owned 100.00%            
Business acquisition, equity interest issued or issuable (in shares) | shares 3,191,358            
Contingent liabilities recognised as of acquisition date $ 67,000,000            
Increase (decrease) in contingent consideration asset (liability) $ (47,000,000)            
Transaction costs       $ 1,200,000      
Early prepayment options, discounted rate 7.50%            
Acquisition of Ruby Hill | First Milestone Payment              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 17,000,000            
Prepayment period options 15 months            
Acquisition of Ruby Hill | First Milestone Payment | Minimum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 60 days            
Acquisition of Ruby Hill | First Milestone Payment | Maximum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 15 months            
Acquisition of Ruby Hill | First Milestone Payment | At fair value              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 17,000,000            
Acquisition of Ruby Hill | Second Milestone Payment              
Disclosure of detailed information about business combination [line items]              
Deferred consideration 15,000,000            
Consideration reduce, subject to early prepayment option 5,000,000            
Deferred consideration, subject to early prepayment condition to share amount option $ 7,500,000            
Acquisition of Ruby Hill | Second Milestone Payment | Minimum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 60 days            
Acquisition of Ruby Hill | Second Milestone Payment | Maximum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 24 months            
Acquisition of Ruby Hill | Second Milestone Payment | At fair value              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 10,000,000            
Acquisition of Ruby Hill | Third Milestone Payment              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 15,000,000            
Acquisition of Ruby Hill | Third Milestone Payment | Minimum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 90 days            
Acquisition of Ruby Hill | Third Milestone Payment | Maximum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 30 months            
Acquisition of Ruby Hill | Third Milestone Payment | At fair value              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 20,000,000            
Acquisition of Ruby Hill | Fourth Milestone Payment              
Disclosure of detailed information about business combination [line items]              
Deferred consideration 20,000,000            
Consideration reduce, subject to early prepayment option 20,000,000            
Deferred consideration, subject to early prepayment condition to share amount option $ 10,000,000            
Subject to early prepayment option, period 24 months            
Percentage subject to early prepayment condition, not to exceed 9.99%            
Acquisition of Ruby Hill | Fourth Milestone Payment | Minimum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 90 days            
Acquisition of Ruby Hill | Fourth Milestone Payment | Maximum              
Disclosure of detailed information about business combination [line items]              
Prepayment period options 36 months            
Acquisition of Ruby Hill | Fourth Milestone Payment | At fair value              
Disclosure of detailed information about business combination [line items]              
Deferred consideration $ 20,000,000