XML 88 R62.htm IDEA: XBRL DOCUMENT
v3.20.4

RESTRICTED CASH AND INVESTMENTS (Details) - CAD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | $ 12,018 | $ 11,994
Cash and Cash Equivalents |  |
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | 2,883 | 2,859
Investments |  |
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | 9,135 | 9,135
Elliot Lake Reclamation Trust Fund |  |
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | 2,883 | 2,859
Letters of Credit Facility Pledged Assets |  |
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | 9,000 | 9,000
Letters of Credit Additional Collateral |  |
DisclosureOfRestrictedCashAndInvestmentsLineItems [Line Items] |  |
Restricted cash and investments | $ 135 | $ 135

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

X
- Definition The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RestrictedCashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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