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SHARE PURCHASE WARRANTS (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CAD ($) shares
SHARE PURCHASE WARRANTS |
Number of warrants, beginning | shares | 55,006,475
Expiry of share purchase warrants | shares | (55,006,475)
Number of warrants, ending | shares | 0
Warrant Liability, beginning | $ | $ 0
Expiry of share purchase warrants | $ | 0
Warrant Liability, ending | $ | $ 0

X
- Definition The amount of noncurrent share purchased on warrants liability. + References No definition available. + Details
Name: | dnn_NoncurrentSharePurchaseWarrantsLiability
Namespace Prefix: | dnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of noncurrent share purchased on warrants liability expired. + References No definition available. + Details
Name: | dnn_NoncurrentSharePurchaseWarrantsLiabilityExpired
Namespace Prefix: | dnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | dnn_NumberOfWarrants
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants expired during the period. + References No definition available. + Details
Name: | dnn_NumberOfWarrantsExpired
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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