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SHARE PURCHASE WARRANTS (Details) - CAD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Share Purchase Warrants Details Abstract
Share purchase warrants, weighted average exercise price, beginning	$ 1.27	$ 1.27
Share purchase warrants, shares, beginning	1,673,077	1,673,077
Share purchase warrants, beginning	$ 435	$ 435

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- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

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- References

No definition available.

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- References

No definition available.

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Namespace Prefix:	DNN_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- 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

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