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SHAREHOLDERS' EQUITY (Details)
 1 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 0 Months Ended
Jan. 31, 2013
Sep. 30, 2013
Item
Dec. 31, 2013
USD ($)
Item
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Sep. 30, 2013
Maximum
Dec. 31, 2012
Litigation settlement agreement with respect to the Los Azules Copper Project
TNR
USD ($)
Jan. 24, 2012
Minera Andes Inc.
USD ($)
Jan. 24, 2012
Minera Andes Inc.
CAD
Shares of common stock issued upon exercise of stock options 1,000,000   48,000 445,000 163,000     45,000 45,000
Litigation settlement liabilities     $ 200,000            
Weighted average exercise price of stock options (in dollars per share)     $ 1.97 $ 1.84 $ 2.52       1.80
Proceeds from exercise of stock options     171,000 3,885,000 773,000     76,926  
Shares of common stock issued as payment for mining concessions in Mexico     41,500            
Settlement agreement regarding outstanding litigation                  
Litigation settlement liability       $ 3,830,000     $ 3,800,000    
Number of mining contractors with which the entity has entered into an agreement   1 1            
Number of shares to be issued to settle parts of expected future account payables           2,500,000      
Initial term of the agreement     6 months            
Number of shares required to be issued under the agreement     90,300            
Exchangeable shares converted into common stock     51,100,000            
Outstanding Exchangeable Shares not exchanged     32,200,000