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v3.20.4

OTHER LIABILITIES (Details Narrative) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Other Liabilities |  |
Letter of credit and standby fees | $ 398 | $ 397

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

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