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ASSET RETIREMENT OBLIGATIONS (Tables) | 3 Months Ended
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Mar. 31, 2016
Schedule of Change in Asset Retirement Obligation [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2016 |  |  | 2015 |
Asset retirement obligations, beginning of period | $ | 8,573 |  | $ | 5,683 |
Revision of estimate |  | - |  |  | 877 |
Acquisition of Uranerz |  | - |  |  | 2,145 |
Accretion of liabilities |  | 175 |  |  | 494 |
Settlements |  | (248 | ) |  | (626 | )
Asset retirement obligations, end of period | $ | 8,500 |  | $ | 8,573 |
Asset retirement obligations: |  |  |  |  |  |
Current | $ | 751 |  | $ | 1,000 |
Non-current |  | 7,749 |  |  | 7,573 |
Asset retirement obligations, end of period | $ | 8,500 |  | $ | 8,573 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration