Organization and Basis Of Presentation (Details) (USD $)	Dec. 31, 2014
Organization and Basis Of Presentation
Percentage of Transcontinental Realty Investors, Inc on common stock	81.12%
Land in acres	178.1fil_LandInAcres
Note Receivables due from related parties	$ 25,400,000

Percentage of stock held by Transcontinental Realty Investors, Inc. in the common stock of Income Opportunity Realty Investors Inc.

No definition available.

Name:	fil_PercentageOfTranscontinentalRealtyInvestorsIncOnCommonStock1
Namespace Prefix:	fil_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant