XML 76 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1

1. NATURE OF OPERATIONS (Details Narrative)	12 Months Ended
	Dec. 31, 2017
Wheeler River Joint Venture
Disclosure of joint operations [line items]
Interest in joint operations	63.30%
McClean Lake Joint Venture
Disclosure of joint operations [line items]
Interest in joint operations	22.50%
Midwest Joint Venture
Disclosure of joint operations [line items]
Interest in joint operations	25.17%

X

- References

No definition available.

+ Details

Name:	DNN_ProportionOfOwnershipInterestInJointOperations
Namespace Prefix:	DNN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfJointOperationsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_JointVenturesAxis=DNN_WheelerRiverJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointVenturesAxis=DNN_McCleanLakeJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointVenturesAxis=DNN_MidwestJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: