Document and Entity Information	3 Months Ended
Jun. 30, 2011	Aug. 05, 2011
Document and Entity Information
Entity Registrant Name	INCOME OPPORTUNITY REALTY INVESTORS INC /TX/
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Amendment Flag	false
Entity Central Index Key	0000949961
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		4,168,214
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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