<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>49</ContextCount>
  <ElementCount>236</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>18</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-consolidated-balance-sheets-current-period-unaudited</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-consolidated-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-consolidated-statements-of-income-unaudited</Role>
      <ShortName>Consolidated Statements of Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Disclosure - Note 1 - Nature of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-1-nature-of-operations</Role>
      <ShortName>Note 1 - Nature of Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Disclosure - Note 2 - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 3 - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition</Role>
      <ShortName>Note 3 - Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 4 - Units Open and Under Development</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-4-units-open-and-under-development</Role>
      <ShortName>Note 4 - Units Open and Under Development</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 5 - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-5-earnings-per-share</Role>
      <ShortName>Note 5 - Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 6 - Goodwill and Other Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-6-goodwill-and-other-intangible-assets</Role>
      <ShortName>Note 6 - Goodwill and Other Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 7 - Lease Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-7-lease-commitments</Role>
      <ShortName>Note 7 - Lease Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 8 - Stockholder's Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-8-stockholders-equity</Role>
      <ShortName>Note 8 - Stockholder's Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 9 - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-9-subsequent-events</Role>
      <ShortName>Note 9 - Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies</ParentRole>
      <Position>15</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies-tables</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies</ParentRole>
      <Position>16</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 3 - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-tables</Role>
      <ShortName>Note 3 - Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition</ParentRole>
      <Position>17</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 4 - Units Open and Under Development (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-4-units-open-and-under-development-tables</Role>
      <ShortName>Note 4 - Units Open and Under Development (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-4-units-open-and-under-development</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 5 - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-5-earnings-per-share-tables</Role>
      <ShortName>Note 5 - Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-5-earnings-per-share</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 7 - Lease Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-7-lease-commitments-tables</Role>
      <ShortName>Note 7 - Lease Commitments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-7-lease-commitments</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 1 - Nature of Operations (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-1-nature-of-operations-details-textual</Role>
      <ShortName>Note 1 - Nature of Operations (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-1-nature-of-operations</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies-details-textual</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies-tables</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents, and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-2-summary-of-significant-accounting-policies-summary-of-cash-cash-equivalents-and-restricted-cash-details</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents, and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 3 - Revenue Recognition (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-details-textual</Role>
      <ShortName>Note 3 - Revenue Recognition (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-tables</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Note 3 - Revenue Recognition - Contract Balances Subject to ASC 606 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-contract-balances-subject-to-asc-606-details</Role>
      <ShortName>Note 3 - Revenue Recognition - Contract Balances Subject to ASC 606 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 3 - Revenue Recognition - Changes in Contract Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-changes-in-contract-balances-details</Role>
      <ShortName>Note 3 - Revenue Recognition - Changes in Contract Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 3 - Revenue Recognition - Remaining Performance Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-remaining-performance-obligations-details</Role>
      <ShortName>Note 3 - Revenue Recognition - Remaining Performance Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 3 - Revenue Recognition - Remaining Performance Obligations 2 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-3-revenue-recognition-remaining-performance-obligations-2-details</Role>
      <ShortName>Note 3 - Revenue Recognition - Remaining Performance Obligations 2 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Note 4 - Units Open, Licensed and Under Development - Operating Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-4-units-open-licensed-and-under-development-operating-units-details</Role>
      <ShortName>Note 4 - Units Open, Licensed and Under Development - Operating Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 5 - Earnings Per Share - Computation of Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-5-earnings-per-share-computation-of-earnings-per-share-details</Role>
      <ShortName>Note 5 - Earnings Per Share - Computation of Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 6 - Goodwill and Other Intangible Assets (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-6-goodwill-and-other-intangible-assets-details-textual</Role>
      <ShortName>Note 6 - Goodwill and Other Intangible Assets (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-6-goodwill-and-other-intangible-assets</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 7 - Lease Commitments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-7-lease-commitments-details-textual</Role>
      <ShortName>Note 7 - Lease Commitments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-7-lease-commitments-tables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure - Note 7 - Lease Commitments - Gross Future Minimum Annual Rental Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-7-lease-commitments-gross-future-minimum-annual-rental-commitments-details</Role>
      <ShortName>Note 7 - Lease Commitments - Gross Future Minimum Annual Rental Commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="babb-20200229.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Note 8 - Stockholder's Equity (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://babcorp.com/20200229/role/statement-note-8-stockholders-equity-details-textual</Role>
      <ShortName>Note 8 - Stockholder's Equity (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://babcorp.com/20200229/role/statement-note-8-stockholders-equity</ParentRole>
      <Position>34</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>babb-20200229.xml</File>
    <File>babb-20200229.xsd</File>
    <File>babb-20200229_cal.xml</File>
    <File>babb-20200229_def.xml</File>
    <File>babb-20200229_lab.xml</File>
    <File>babb-20200229_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
