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Schedule of Summary of Mineral Properties (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Mineral Properties total	$ 91,000	$ 91,031
Uranerz ISR properties [Member]
Mineral Properties total	36,065	36,096
In-situ Recovery total [Member]
Mineral Properties total	36,065	36,096
Sheep Mountain [Member]
Mineral Properties total	34,183	34,183
Roca Honda [Member]
Mineral Properties total	19,465	19,465
Other [Member]
Mineral Properties total	1,287	1,287
Conventional total [Member]
Mineral Properties total	$ 54,935	$ 54,935

X

- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=56951519&loc=d3e64895-109465

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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