<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>6</ContextCount>
  <ElementCount>50</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>3</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0002 - Statement - CONSOLIDATED BALANCE SHEET (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>CONSOLIDATED BALANCE SHEET (Unaudited)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0003 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/ConsolidatedBalanceSheetParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEET (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0004 - Statement - CONSOLIDATED STATEMENT OF INCOME, EXPENSE AND RETAINED EARNINGS FOR THE FISCAL QUARTERS ENDED</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/ConsolidatedStatementOfIncomeExpenseAndRetainedEarningsForFiscalQuartersEnded</Role>
      <ShortName>CONSOLIDATED STATEMENT OF INCOME, EXPENSE AND RETAINED EARNINGS FOR THE FISCAL QUARTERS ENDED</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0005 - Disclosure - Note 1. Summary of Significant Accounting Policies Consolidation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/Note1.SummaryOfSignificantAccountingPoliciesConsolidation</Role>
      <ShortName>Note 1. Summary of Significant Accounting Policies Consolidation</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0006 - Disclosure - Note 2 - Mining Properties and Interests</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/Note2-MiningPropertiesAndInterests</Role>
      <ShortName>Note 2 - Mining Properties and Interests</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0007 - Disclosure - Note 3 - Operating Funds</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/Note3-OperatingFunds</Role>
      <ShortName>Note 3 - Operating Funds</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0008 - Disclosure - Note 1. Summary of Significant Accounting Policies Consolidation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://excaliburindustries.com/role/Note1.SummaryOfSignificantAccountingPoliciesConsolidationPolicies</Role>
      <ShortName>Note 1. Summary of Significant Accounting Policies Consolidation (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Process Flow-Through: 0002 - Statement - CONSOLIDATED BALANCE SHEET (Unaudited)</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Aug. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'May 31, 2012'</Log>
    <Log type="Info">Process Flow-Through: 0003 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0004 - Statement - CONSOLIDATED STATEMENT OF INCOME, EXPENSE AND RETAINED EARNINGS FOR THE FISCAL QUARTERS ENDED</Log>
  </Logs>
  <InputFiles>
    <File>exin-20130831.xml</File>
    <File>exin-20130831.xsd</File>
    <File>exin-20130831_cal.xml</File>
    <File>exin-20130831_def.xml</File>
    <File>exin-20130831_lab.xml</File>
    <File>exin-20130831_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
