XML 107 R87.htm IDEA: XBRL DOCUMENT
v3.10.0.1

RECLAMATION OBLIGATIONS (Details 1) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
DisclosureOfReclamationObligationsLineItems [Line Items] |  |
Reclamation obligations, beginning | $ 28,509 | $ 28,148
Expenditures incurred | (755) | (981)
Reclamation obligations, ending | 30,064 | 28,509
Reclamation Obligations |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |
Reclamation obligations, beginning | 28,509 | 28,148
Accretion | 1,316 | 1,296
Expenditures incurred | (755) | (981)
Liability adjustments-income statement (note 23) | 369 | 71
Liability adjustments-balance sheet (note 13) | 625 | (25)
Reclamation obligations, ending | $ 30,064 | $ 28,509

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

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

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

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

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

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

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=DNN_ReclamationObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |