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v3.22.4

SHARE-BASED COMPENSATION - PSU Rollforward (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
SHARE-BASED COMPENSATION |  |
PSUs outstanding, beginning | 1,530,000 | 2,020,000
Grants | 120,000 | 0
Exercises | (120,000) | (210,000)
Forfeitures | (60,000) | (280,000)
PSUs outstanding, ending | 1,470,000 | 1,530,000
PSUs vested, ending | 1,080,000 | 870,000
PSUs outstanding, weighted average fair value, beginning | $ 0.62 | $ 0.63
PSUs grants, weighted average fair value | 2.08 | 0
PSUs exercises, weighted average fair value | 0.38 | 0.66
PSUs forfeitures, weighted average fair value | 0.38 | 0.68
PSUs outstanding, weighted average fair value, ending | 0.77 | 0.62
PSUs vested, weighted average fair value, ending | $ 0.65 | $ 0.63

X
- Definition The number of PSUs outstanding in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_NumberOfOutstandingPSUs
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of PSUs exercised in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_NumberOfPSUsExercisedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of PSUs forfeited in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_NumberOfPSUsForfeitedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of PSUs outstanding in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_NumberOfPSUsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of PSUs vested in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_NumberOfPSUsVestedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The weighted average exercise price of PSUs exercised in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_WeightedAverageFairValueOfPSUsExercisedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of PSUs forfeited in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_WeightedAverageFairValueOfPSUsForfeitedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of PSUs granted in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_WeightedAverageFairValueOfPSUsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of PSUs outstanding in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_WeightedAverageFairValueOfPSUsOutstandingInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of PSUs vested in a share-based payment arrangement. + References No definition available. + Details
Name: | dnn_WeightedAverageFairValueOfPSUsVestedInSharebasedPaymentArrangement
Namespace Prefix: | dnn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant