XML 124 R66.htm IDEA: XBRL DOCUMENT
v3.22.0.1

INVESTMENT IN JOINT VENTURE (Details) | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CAD ($) | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | ---
Investment in joint venture |  |  |  |
Total | $ 21,392,000 | $ 21,392,000 | $ 0 |
J C U |  |  |  |
Investment in joint venture |  |  |  |
Total |  | $ 21,392,000 |  | $ 0

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

X
- References No definition available. + Details
Name: | dnn_NoncurrentinvestmentsJointVenture
Namespace Prefix: | dnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_JointVenturesAxis=dnn_JCUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |