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RENTAL EXPENSE, COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2014
RENTAL EXPENSE, COMMITMENTS AND CONTINGENCIES |
Schedule of minimum amounts under purchase commitments, long term leases covering office space, exploration expenditures, option payments on properties |
|  | 2015 |  | 2016 |  | 2017 |  | 2018 |  | 2019 |
|  | (in thousands) |
Lease Obligations |  | $ | 928 |  | $ | 543 |  | $ | 464 |  | $ | 466 |  | $ | 472 |
Purchase Commitments |  |  | 17 |  |  | — |  |  | — |  |  | — |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 945 |  | $ | 543 |  | $ | 464 |  | $ | 466 |  | $ | 472 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph a -Subparagraph 5 + Details
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