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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 |  |  |  |  |  |

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- Definition Represents the number of shares to be issued to settle parts of expected future account payable of the entity. + References No definition available. + Details
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- Definition Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized. + References No definition available. + Details
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 25 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6396582&loc=d3e15243-108350 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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