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SHARE PURCHASE WARRANTS (Details) - CAD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Share Purchase Warrants Abstract |  |
Share purchase warrants, weighted average exercise price | $ 0 | $ 1.27
Share purchase warrants, shares | 0 | 1,673,077
Share purchase warrants | $ 0 | $ 435

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- References No definition available. + Details
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Namespace Prefix: | DNN_
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Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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- References No definition available. + Details
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Namespace Prefix: | DNN_
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Balance Type: | na
Period Type: | instant

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- Definition The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard -URIDate 2019-03-27 + Details
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