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INVENTORIES | 12 Months Ended
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Dec. 31, 2018
Inventories |
INVENTORIES | The inventories balance consists of:
|  | At December 31 |  | At December 31 |  | At January 1
(in thousands) |  | 2018 |  | 2017 |  | 2017
Uranium concentrates | $ | 526 | $ | 526 | $ | 526
Inventory of ore in stockpiles |  | 2,098 |  | 2,098 |  | 2,098
Mine and mill supplies in MLJV |  | 3,058 |  | 2,928 |  | 2,670
| $ | 5,682 | $ | 5,552 | $ | 5,294
Inventories-by balance sheet presentation: |  |  |  |  |  |
Current | $ | 3,584 | $ | 3,454 | $ | 3,196
Long term-ore in stockpiles |  | 2,098 |  | 2,098 |  | 2,098
| $ | 5,682 | $ | 5,552 | $ | 5,294
Long-term ore in stockpile inventory represents an estimate of the amount of ore on the stockpile in excess of the next twelve months of planned mill production.

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2018-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2018-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2018-03-16 + Details
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