XML 104 R86.htm IDEA: XBRL DOCUMENT
v3.8.0.1

15. RECLAMATION OBLIGATIONS (Details Narrative) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Elliot Lake |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |
Undiscounted amount of estimated future reclamation costs | $ 26,147 | $ 24,254
McClean And Midwest Joint Ventures |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |
Undiscounted amount of estimated future reclamation costs | $ 18,182 | $ 16,774

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_UndiscountedFutureReclamationCosts
Namespace Prefix: | DNN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=DNN_ElliotLakeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=DNN_McCleanAndMidwestJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |