<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.6.0.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>134</ContextCount>
  <ElementCount>294</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>55</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-balance-sheets-</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-balance-sheets-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-statements-of-operations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-statements-of-comprehensive-income-loss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-statements-of-stockholders-equity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-consolidated-statements-of-cash-flows-</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 2 - Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations</Role>
      <ShortName>Note 2 - Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 3 - Option Agreement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-3-option-agreement</Role>
      <ShortName>Note 3 - Option Agreement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 4 - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-4-investments</Role>
      <ShortName>Note 4 - Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 5 - Accounts Receivable and Customer Concentrations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations</Role>
      <ShortName>Note 5 - Accounts Receivable and Customer Concentrations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 6 - Short-term Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings</Role>
      <ShortName>Note 6 - Short-term Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 7 - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes</Role>
      <ShortName>Note 7 - Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 8 - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies</Role>
      <ShortName>Note 8 - Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 9 - Post-retirement Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-9-postretirement-benefits</Role>
      <ShortName>Note 9 - Post-retirement Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 10 - Defined Contribution Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-10-defined-contribution-plans</Role>
      <ShortName>Note 10 - Defined Contribution Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 11 - Related Party Transaction</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-11-related-party-transaction</Role>
      <ShortName>Note 11 - Related Party Transaction</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 12 - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-12-stockholders-equity</Role>
      <ShortName>Note 12 - Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 13 - Stock Option Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans</Role>
      <ShortName>Note 13 - Stock Option Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 14 - Foreign Revenues and Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations</Role>
      <ShortName>Note 14 - Foreign Revenues and Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 15 - Industry Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-15-industry-segments</Role>
      <ShortName>Note 15 - Industry Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 16 - Net Income (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share</Role>
      <ShortName>Note 16 - Net Income (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 17 - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-17-subsequent-events</Role>
      <ShortName>Note 17 - Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-tables</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 2 - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations-tables</Role>
      <ShortName>Note 2 - Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 4 - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-4-investments-tables</Role>
      <ShortName>Note 4 - Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-4-investments</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Note 5 - Accounts Receivable and Customer Concentrations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations-tables</Role>
      <ShortName>Note 5 - Accounts Receivable and Customer Concentrations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 6 - Short-term Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings-tables</Role>
      <ShortName>Note 6 - Short-term Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 7 - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-tables</Role>
      <ShortName>Note 7 - Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 8 - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies-tables</Role>
      <ShortName>Note 8 - Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure - Note 13 - Stock Option Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-tables</Role>
      <ShortName>Note 13 - Stock Option Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Note 14 - Foreign Revenues and Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations-tables</Role>
      <ShortName>Note 14 - Foreign Revenues and Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>034 - Disclosure - Note 16 - Net Income (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share-tables</Role>
      <ShortName>Note 16 - Net Income (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>035 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-details-textual</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-tables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>036 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies - Property and Equipment - Useful Lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-useful-lives-details</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies - Property and Equipment - Useful Lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>037 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies - Property and Equipment - Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-components-details</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies - Property and Equipment - Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>038 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies - Stock-Based Compensation - Weighted Average Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-1-organization-and-summary-of-significant-accounting-policies-stockbased-compensation-weighted-average-assumptions-details</Role>
      <ShortName>Note 1 - Organization and Summary of Significant Accounting Policies - Stock-Based Compensation - Weighted Average Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>039 - Disclosure - Note 2 - Discontinued Operations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations-details-textual</Role>
      <ShortName>Note 2 - Discontinued Operations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations-tables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>040 - Disclosure - Note 2 - Discontinued Operations - Condensed Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-2-discontinued-operations-condensed-financial-information-details</Role>
      <ShortName>Note 2 - Discontinued Operations - Condensed Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>041 - Disclosure - Note 3 - Option Agreement (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-3-option-agreement-details-textual</Role>
      <ShortName>Note 3 - Option Agreement (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-3-option-agreement</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>042 - Disclosure - Note 4 - Investments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-4-investments-details-textual</Role>
      <ShortName>Note 4 - Investments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-4-investments-tables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>043 - Disclosure - Note 4 - Investments - NKD Enterprises, LLC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-4-investments-nkd-enterprises-llc-details</Role>
      <ShortName>Note 4 - Investments - NKD Enterprises, LLC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>044 - Disclosure - Note 4 - Investments - Unaudited Summarized Financial Information for NKD Enterprises, LLC - Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-4-investments-unaudited-summarized-financial-information-for-nkd-enterprises-llc-operations-details</Role>
      <ShortName>Note 4 - Investments - Unaudited Summarized Financial Information for NKD Enterprises, LLC - Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>045 - Disclosure - Note 5 - Accounts Receivable and Customer Concentrations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations-details-textual</Role>
      <ShortName>Note 5 - Accounts Receivable and Customer Concentrations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations-tables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>046 - Disclosure - Note 5 - Accounts Receivable and Customer Concentrations - Concentration of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-5-accounts-receivable-and-customer-concentrations-concentration-of-revenue-details</Role>
      <ShortName>Note 5 - Accounts Receivable and Customer Concentrations - Concentration of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>047 - Disclosure - Note 6 - Short-term Borrowings (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings-details-textual</Role>
      <ShortName>Note 6 - Short-term Borrowings (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings-tables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>048 - Disclosure - Note 6 - Short-term Borrowings - Credit Facility Terms and Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-6-shortterm-borrowings-credit-facility-terms-and-borrowings-details</Role>
      <ShortName>Note 6 - Short-term Borrowings - Credit Facility Terms and Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>049 - Disclosure - Note 7 - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-details-textual</Role>
      <ShortName>Note 7 - Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-tables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>050 - Disclosure - Note 7 - Income Taxes - Income Tax Provision from Continuing Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-income-tax-provision-from-continuing-operations-details</Role>
      <ShortName>Note 7 - Income Taxes - Income Tax Provision from Continuing Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>051 - Disclosure - Note 7 - Income Taxes - Reconciliation of Income Taxes Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-reconciliation-of-income-taxes-rates-details</Role>
      <ShortName>Note 7 - Income Taxes - Reconciliation of Income Taxes Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>052 - Disclosure - Note 7 - Income Taxes - Net Deferred Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-net-deferred-tax-assets-details</Role>
      <ShortName>Note 7 - Income Taxes - Net Deferred Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>053 - Disclosure - Note 7 - Income Taxes - Net Operating Loss Carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-7-income-taxes-net-operating-loss-carryforwards-details</Role>
      <ShortName>Note 7 - Income Taxes - Net Operating Loss Carryforwards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>054 - Disclosure - Note 8 - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies-details-textual</Role>
      <ShortName>Note 8 - Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies-tables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>055 - Disclosure - Note 8 - Commitments and Contingencies - Future Minimum Lease Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-8-commitments-and-contingencies-future-minimum-lease-payments-details</Role>
      <ShortName>Note 8 - Commitments and Contingencies - Future Minimum Lease Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>056 - Disclosure - Note 9 - Post-retirement Benefits (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-9-postretirement-benefits-details-textual</Role>
      <ShortName>Note 9 - Post-retirement Benefits (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-9-postretirement-benefits</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>057 - Disclosure - Note 10 - Defined Contribution Plans (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-10-defined-contribution-plans-details-textual</Role>
      <ShortName>Note 10 - Defined Contribution Plans (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-10-defined-contribution-plans</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>058 - Disclosure - Note 11 - Related Party Transaction (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-11-related-party-transaction-details-textual</Role>
      <ShortName>Note 11 - Related Party Transaction (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-11-related-party-transaction</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>059 - Disclosure - Note 12 - Stockholders' Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-12-stockholders-equity-details-textual</Role>
      <ShortName>Note 12 - Stockholders' Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-12-stockholders-equity</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>060 - Disclosure - Note 13 - Stock Option Plans (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-details-textual</Role>
      <ShortName>Note 13 - Stock Option Plans (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-tables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>061 - Disclosure - Note 13 - Stock Option Plans - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-stock-option-activity-details</Role>
      <ShortName>Note 13 - Stock Option Plans - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>062 - Disclosure - Note 13 - Stock Option Plans - Stock Options Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-stock-options-outstanding-details</Role>
      <ShortName>Note 13 - Stock Option Plans - Stock Options Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>063 - Disclosure - Note 13 - Stock Option Plans - Stock Options Exercisable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-13-stock-option-plans-stock-options-exercisable-details</Role>
      <ShortName>Note 13 - Stock Option Plans - Stock Options Exercisable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>064 - Disclosure - Note 14 - Foreign Revenues and Operations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations-details-textual</Role>
      <ShortName>Note 14 - Foreign Revenues and Operations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations-tables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>065 - Disclosure - Note 14 - Foreign Revenues and Operations - Foreign Revenues (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-14-foreign-revenues-and-operations-foreign-revenues-details</Role>
      <ShortName>Note 14 - Foreign Revenues and Operations - Foreign Revenues (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>066 - Disclosure - Note 15 - Industry Segments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-15-industry-segments-details-textual</Role>
      <ShortName>Note 15 - Industry Segments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-15-industry-segments</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>067 - Disclosure - Note 16 - Net Income (Loss) Per Share (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share-details-textual</Role>
      <ShortName>Note 16 - Net Income (Loss) Per Share (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share-tables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>068 - Disclosure - Note 16 - Net Income (Loss) Per Share - Reconciliation of Basic and Diluted Income Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share-reconciliation-of-basic-and-diluted-income-per-share-details</Role>
      <ShortName>Note 16 - Net Income (Loss) Per Share - Reconciliation of Basic and Diluted Income Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-16-net-income-loss-per-share-tables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ins-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>069 - Disclosure - Note 17 - Subsequent Events (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.intelsys.com/20161231/role/statement-note-17-subsequent-events-details-textual</Role>
      <ShortName>Note 17 - Subsequent Events (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.intelsys.com/20161231/role/statement-note-17-subsequent-events</ParentRole>
      <Position>70</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ins-20161231.xml</File>
    <File>ins-20161231.xsd</File>
    <File>ins-20161231_cal.xml</File>
    <File>ins-20161231_def.xml</File>
    <File>ins-20161231_lab.xml</File>
    <File>ins-20161231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
