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INVESTMENT IN JOINT VENTURE (Details 1)	Dec. 31, 2021 USD ($)
Investment in joint venture
Acquisition of 50% of JCU	$ 21,856
Equity share of loss	$ (464,000)

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Period Type:	instant

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- Definition

The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

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Namespace Prefix:	dnn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Namespace Prefix:	dnn_
Data Type:	xbrli:stringItemType
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