Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2011	Dec. 14, 2011	Jan. 31, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	NON INVASIVE MONITORING SYSTEMS INC /FL/
Entity Central Index Key	0000720762
Document Type	10-Q
Document Period End Date	Oct. 31, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--07-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 9.4
Entity Common Stock, Shares Outstanding		68,922,423