Document and Entity Information	3 Months Ended
	Nov. 30, 2012	Jan. 04, 2013
Document and Entity Information
Entity Registrant Name	BSD MEDICAL CORP
Document Type	10-Q
Document Period End Date	Nov. 30, 2012
Amendment Flag	false
Entity Central Index Key	0000320174
Current Fiscal Year End Date	--08-31
Entity Common Stock, Shares Outstanding		29,753,191
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1