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SHAREHOLDERS' EQUITY (Details) - USD ($)
 12 Months Ended
Mar. 02, 2022
Jan. 29, 2021
Dec. 31, 2020
Sep. 10, 2020
Nov. 20, 2019
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Jul. 28, 2022
Dec. 31, 2019
Price per unit                   $ 1  
Net proceeds             $ 10,320,000 $ 10,785,000 $ 15,478,000    
Sale of common stock for cash, net of issuance costs             $ 41,263,000 $ 29,875,000      
Weighted average exercise price of stock options (in dollars per share)                 $ 10.20    
Outstanding options (in shares)     701,000       447,787 616,958 701,000   527,000
Stock options exercised (in shares)                 14,000    
Stock options issued (in shares)               95,000 510,000    
November 2019 Offering                      
Number of units issued         3,775,000            
Price per unit         $ 13.25            
Net proceeds         $ 46,600,000            
Warrant expiration term         5 years            
Issuance costs         $ 3,500,000            
Outstanding warrants             $ 2,170,625        
Equity Financing In February 2021                      
Number of units issued               3,000,000      
Price per unit               $ 10.50      
Gross proceeds               $ 31,500,000      
Net proceeds               29,900,000      
Issuance costs               $ 1,700,000      
Common Stock [Member]                      
Number of units issued             1,450,000 1,260,000 1,397,000    
Net proceeds             $ 10,320,000 $ 10,785,000 $ 15,478,000    
Shares issued for acquisition of mineral property interests (in shares)                 5,000    
Stock options exercised (in shares)                 14,000    
Common Stock [Member] | November 2019 Offering                      
Net proceeds         37,300,000            
Warrant | November 2019 Offering                      
Net proceeds         $ 9,300,000            
Number of exercisable warrants to convert to common stock         10            
Number of shares of common stock         1            
Number of warrants received for each share of common stock share sold         0.50            
Warrant at Second Stock Price | November 2019 Offering                      
Number of shares of common stock         1            
Price per common share for each warrant         $ 17.22            
Flow Through Common Shares | Canadian Development Expenses                      
Number of units issued   1,260,060                  
Price per unit   $ 10.10                  
Gross proceeds   $ 12,700,000                  
Net proceeds   12,000,000.0                  
Issuance costs   700,000                  
Net proceeds allocated to the sale of tax benefits   1,200,000                  
Sale of common stock for cash, net of issuance costs   $ 10,800,000                  
Exploration expenditures               12,700,000      
Flow Through Common Shares | Canadian Exploration Expenditures                      
Number of units issued 1,450,000   766,990 629,816              
Price per unit $ 10.40   $ 12.80 $ 16.50         $ 12.80    
Gross proceeds $ 15,100,000   $ 9,800,000 $ 10,400,000              
Net proceeds 14,400,000   9,800,000 9,800,000              
Issuance costs 800,000   0 600,000              
Net proceeds allocated to the sale of tax benefits 4,100,000   2,100,000 2,000,000.0              
Sale of common stock for cash, net of issuance costs $ 10,300,000   $ 7,700,000 $ 7,800,000              
Exploration expenditures             $ 21,400,000 $ 12,700,000      
Recent Raise           $15.1