Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Mar. 08, 2013	Jun. 30, 2012
Document Type	10-K
Amendment Flag	false
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			88,432,240
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well Known Seasoned Issuer	No
Entity Public Float		$ 77,207,574
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY