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ASSET RETIREMENT OBLIGATIONS | 3 Months Ended
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Mar. 31, 2014
ASSET RETIREMENT OBLIGATIONS |
ASSET RETIREMENT OBLIGATIONS | 8. ASSET RETIREMENT OBLIGATIONS The following table summarizes the changes in the reserve for future restoration and reclamation costs on the balance sheet:
|  | March 31, |  | December 31, |
|  | 2014 |  | 2013 |
Balance, January 1, 2014 |  | $ | 3,833,608 |  | $ | 4,498,057 |
Changes in cash flow estimates |  | — |  | 584,025 |
Costs incurred |  | (209 | ) | (1,638,214 | )
Accretion expense |  | 79,179 |  | 389,740 |
Balance, March 31, 2014 |  | $ | 3,912,578 |  | $ | 3,833,608 |

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 + Details
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