Document and Entity Information (USD $)	12 Months Ended
	Aug. 31, 2012	Nov. 09, 2012	Feb. 28, 2012
Document and Entity Information
Entity Registrant Name	BSD MEDICAL CORP
Document Type	10-K
Document Period End Date	Aug. 31, 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	2012
Document Fiscal Period Focus	FY
Entity Public Float			$ 50,192,000