XML 134 R114.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SEGMENTED INFORMATION (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [line items] |  |  |
Revenues | $ 15,550 | $ 16,067 |
Expenses: |  |  |
Operating expenses | (15,948) | (13,758) |
Exploration and evaluation | (15,457) | (16,643) |
General and administrative | (7,189) | (7,680) |
Impairment reversal (expense) | (6,086) | 331 |
Total expenses | (44,680) | (37,750) |
Segment income (loss) | (29,130) | (21,683) |
Revenues - supplemental: |  |  |
Environmental services | 9,298 | 9,232 |
Management fees | 2,013 | 1,806 |
Toll milling services |  | 587 |
Toll milling services - deferred revenue | 4,239 | 4,442 |
Revenues | 15,550 | 16,067 |
Capital additions: |  |  |
Property, plant and equipment | 19,096 | 1,086 |
Long-lived assets: |  |  |
Plant and equipment - Cost | 103,430 | 103,186 | $ 103,950
Plant and equipment - Accumulated depreciation | (24,086) | (20,516) | (16,930)
Mineral properties | 178,947 | 166,332 | 165,372
Property, plant and equipment | 258,291 | 249,002 | 252,392
Canada Mining |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 4,239 | 5,029 |
Expenses: |  |  |
Operating expenses | (7,528) | (5,304) |
Exploration and evaluation | (15,457) | (16,643) |
General and administrative | (17) | (16) |
Impairment reversal (expense) | (6,086) | 331 |
Total expenses | (29,088) | (21,632) |
Segment income (loss) | (24,849) | (16,603) |
Revenues - supplemental: |  |  |
Environmental services | 0 | 0 |
Management fees | 0 | 0 |
Toll milling services |  | 587 |
Toll milling services - deferred revenue | 4,239 | 4,442 |
Revenues | 4,239 | 5,029 |
Capital additions: |  |  |
Property, plant and equipment | 19,001 | 1,035 |
Long-lived assets: |  |  |
Plant and equipment - Cost | 98,737 | 98,558 | 99,278
Plant and equipment - Accumulated depreciation | (20,982) | (17,652) | (14,339)
Mineral properties | 178,947 | 166,332 | 165,372
Property, plant and equipment | 256,702 | 247,238 | 250,311
DES |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 9,298 | 9,232 |
Expenses: |  |  |
Operating expenses | (8,211) | (8,230) |
Exploration and evaluation | 0 | 0 |
General and administrative | 0 | 0 |
Impairment reversal (expense) | 0 | 0 |
Total expenses | (8,211) | (8,230) |
Segment income (loss) | 1,087 | 1,002 |
Revenues - supplemental: |  |  |
Environmental services | 9,298 | 9,232 |
Management fees | 0 | 0 |
Toll milling services |  | 0 |
Toll milling services - deferred revenue | 0 | 0 |
Revenues | 9,298 | 9,232 |
Capital additions: |  |  |
Property, plant and equipment | 95 | 51 |
Long-lived assets: |  |  |
Plant and equipment - Cost | 4,399 | 4,334 | 4,378
Plant and equipment - Accumulated depreciation | (2,927) | (2,724) | (2,495)
Mineral properties | 0 | 0 | 0
Property, plant and equipment | 1,472 | 1,610 | 1,883
Corporate and Other |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues | 2,013 | 1,806 |
Expenses: |  |  |
Operating expenses | (209) | (224) |
Exploration and evaluation | 0 | 0 |
General and administrative | (7,172) | (7,664) |
Impairment reversal (expense) | 0 | 0 |
Total expenses | (7,381) | (7,888) |
Segment income (loss) | (5,368) | (6,082) |
Revenues - supplemental: |  |  |
Environmental services | 0 | 0 |
Management fees | 2,013 | 1,806 |
Toll milling services |  | 0 |
Toll milling services - deferred revenue | 0 | 0 |
Revenues | 2,013 | 1,806 |
Capital additions: |  |  |
Property, plant and equipment | 0 | 0 |
Long-lived assets: |  |  |
Plant and equipment - Cost | 294 | 294 | 294
Plant and equipment - Accumulated depreciation | (177) | (140) | (96)
Mineral properties | 0 | 0 | 0
Property, plant and equipment | $ 117 | $ 154 | $ 198

X
- References No definition available. + Details
Name: | DNN_AdditionsOfPropertyPlantAndEquipment
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_CapitalAdditionsAbstract
Namespace Prefix: | DNN_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_RevenueArisingFromRenderingOfEnvironmentalServices
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_RevenueArisingFromRenderingOfMillingServices
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_RevenueArisingFromRendingOfPreSoldMillingServices
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_SegmentProfitLoss
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | DNN_TotalSegmentExpenses
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_AssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_vii&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_75_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DepreciationPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2018-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=6&date=2018-03-01&anchor=para_24_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_ExpenseByNatureAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of income relating to fees and commissions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_FeeAndCommissionIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_130_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_130_d_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ImpairmentLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of assets related to mining activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 37 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_37&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_MiningAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of all operating expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_OperatingExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_PropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The gross carrying amount of fully depreciated property, plant and equipment that is still in use. [Refer: Gross carrying amount [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_79_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_PropertyPlantAndEquipmentGrossCarryingAmountFullyDepreciated
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 28 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_28_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 23 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23_a&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 32 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_32&doctype=Standard -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 33 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_33_a&doctype=Standard -URIDate 2018-03-16 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_34&doctype=Standard -URIDate 2018-03-16 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_a&doctype=Standard -URIDate 2018-03-16 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_103&doctype=Standard -URIDate 2018-03-16 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_102&doctype=Standard -URIDate 2018-03-16 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2018-01-01 -Paragraph 33 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=5&date=2018-03-01&anchor=para_33_b_i&doctype=Standard -URIDate 2018-03-16 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B12 -Subparagraph b -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B12_b_v&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B10_b&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
Name: | ifrs-full_Revenue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_RevenueAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense relating to selling, general and administrative activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_SellingGeneralAndAdministrativeExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_SegmentsAxis=DNN_CanadaMiningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=DNN_DESMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=DNN_CorporateAndOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |