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    <Log type="Info">	Process Flow-Through: Removing column '15 Months Ended
Sep. 30, 2012'</Log>
    <Log type="Info">Process Flow-Through: 1003000 - Statement - Consolidated Statements of Comprehensive Income (Loss)</Log>
    <Log type="Info">Process Flow-Through: 1004000 - Statement - Consolidated Statements of Cash Flows</Log>
    <Log type="Info">	Process Flow-Through: Removing column '15 Months Ended
Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '15 Months Ended
Sep. 30, 2012'</Log>
  </Logs>
  <InputFiles>
    <File>io-20121231.xml</File>
    <File>io-20121231.xsd</File>
    <File>io-20121231_cal.xml</File>
    <File>io-20121231_def.xml</File>
    <File>io-20121231_lab.xml</File>
    <File>io-20121231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
