Document and Entity Information (USD $)	12 Months Ended
	Aug. 31, 2013	Nov. 09, 2013	Feb. 28, 2013
Document and Entity Information
Entity Registrant Name	BSD MEDICAL CORP
Document Type	10-K
Document Period End Date	Aug. 31, 2013
Amendment Flag	false
Entity Central Index Key	0000320174
Current Fiscal Year End Date	--08-31
Entity Common Stock, Shares Outstanding		34,006,202
Entity Filer Category	Non-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	FY
Entity Public Float			$ 30,218,360
Entity Incorporation, State Country Name	Delaware
Entity Incorporation, Date of Incorporation	Jul. 03, 1986