Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Apr. 26, 2013	Jun. 30, 2012
Document Type	10-K
Amendment Flag	true
Amendment Description	The Company hereby files this amendment number one to its annual report on Form 10-K for the year ended December 31, 2012, as originally filed with the United States Securities and Exchange Commission (the “SEC”) on March 28, 2013 (the “Original Report”), to amend and restate the audited annual consolidated financial statements for the year ended December 31, 2012 and to amend and restate the previously restated audited annual consolidated financial statements for the year ended December 31, 2011 by reclassifying costs from Property and Equipment and Construction in Progress to Mineral Property Expenditures. In relation thereto we have amended the audited annual consolidated financial statements contained in Item 15 of Part IV and made corresponding changes to the financial information disclosure contained in Items 6, 7 and 8 of Part II. Note 16 to our audited annual consolidated financial statements contains disclosure describing the specific financial statement line item adjustments that have been made to the consolidated financial statements to effect the restatement. Pursuant to Item 302(a)(2) of Regulation S-K, Note 16 to our audited annual financial statements also includes restated unaudited consolidated financial information for each of interim periods ended March 31, 2012, June 30, 2012 and September 30, 2012. This supplemental financial information includes each financial statement line item amendment affecting the unaudited interim consolidated financial statements for those periods. We have also amended the quarterly supplemental financial information appearing in Item 8 of Part II. As a result of the restatement of our audited annual financial statements for the fiscal year ended December 31, 2012, management has re-evaluated and amended its conclusions regarding disclosure controls and procedures and internal control over financial reporting as contained in Item 9A of Part II. We are also amending the Original Report to include Part III disclosure that was previously intended to be incorporated by reference to our Definitive Proxy Statement on Schedule 14A. As a result we have deleted previous Item 3A, Executive Officer disclosure which is now contained in Item 10 of Part III Other than the amendments stated above, no disclosure contained in any Item of the Original Report is being amended, updated or otherwise revised.
Document Period End Date	Dec. 31, 2012
Trading Symbol	urz
Entity Registrant Name	URANERZ ENERGY CORP.
Entity Central Index Key	0001162324
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		77,207,574
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well Known Seasoned Issuer	No
Entity Public Float			$ 88,432,240
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY