<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>418</ContextCount>
  <ElementCount>609</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>117</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>13</UnitCount>
  <MyReports>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002001 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - CONSOLIDATED STATEMENTS OF MEZZANINE AND STOCKHOLDERS??? EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ConsolidatedStatementsOfMezzanineAndStockholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF MEZZANINE AND STOCKHOLDERS??? EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Basis of Presentation and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - The Company</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Company</Role>
      <ShortName>The Company</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DiscontinuedOperations</Role>
      <ShortName>Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Revenue</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Revenue</Role>
      <ShortName>Revenue</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Merger</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Merger</Role>
      <ShortName>Merger</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Supplementary Balance Sheet Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SupplementaryBalanceSheetInformation</Role>
      <ShortName>Supplementary Balance Sheet Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Goodwill</Role>
      <ShortName>Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Commitments And Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments And Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Share Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensation</Role>
      <ShortName>Share Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - Employee Retirement Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/EmployeeRetirementPlan</Role>
      <ShortName>Employee Retirement Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Related Party Transaction</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RelatedPartyTransaction</Role>
      <ShortName>Related Party Transaction</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/Segments</Role>
      <ShortName>Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2117100 - Disclosure - Quarterly Financial Information (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/QuarterlyFinancialInformationUnaudited</Role>
      <ShortName>Quarterly Financial Information (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2118100 - Disclosure - Redeemable Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RedeemablePreferredStock</Role>
      <ShortName>Redeemable Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Basis of Presentation and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - Basis of Presentation and Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesTables</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2302301 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DiscontinuedOperationsTables</Role>
      <ShortName>Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/DiscontinuedOperations</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Revenue (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RevenueTables</Role>
      <ShortName>Revenue (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Revenue</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Merger (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerTables</Role>
      <ShortName>Merger (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Merger</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Supplementary Balance Sheet Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SupplementaryBalanceSheetInformationTables</Role>
      <ShortName>Supplementary Balance Sheet Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/SupplementaryBalanceSheetInformation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/FairValueMeasurements</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/GoodwillTables</Role>
      <ShortName>Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Goodwill</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Debt</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Leases</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Share Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensationTables</Role>
      <ShortName>Share Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/ShareBasedCompensation</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/IncomeTaxes</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SegmentsTables</Role>
      <ShortName>Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Segments</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2317301 - Disclosure - Quarterly Financial Information (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/QuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>Quarterly Financial Information (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/QuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2318301 - Disclosure - Redeemable Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RedeemablePreferredStockTables</Role>
      <ShortName>Redeemable Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.digirad.com/role/RedeemablePreferredStock</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2401401 - Disclosure - The Company (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/CompanyDetails</Role>
      <ShortName>The Company (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/Company</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - Basis of Presentation and Significant Accounting Policies - Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesBasisOfPresentationDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Basis of Presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - Basis of Presentation and Significant Accounting Policies - Reverse Stock Split (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesReverseStockSplitDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Reverse Stock Split (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2401405 - Disclosure - Basis of Presentation and Significant Accounting Policies - ATRM Merger and Mezzanine equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesAtrmMergerAndMezzanineEquityDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - ATRM Merger and Mezzanine equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2401406 - Disclosure - Basis of Presentation and Significant Accounting Policies - Liquidity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesLiquidityDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Liquidity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2401407 - Disclosure - Basis of Presentation and Significant Accounting Policies - Revenue, Warranty (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesRevenueWarrantyDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Revenue, Warranty (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2401408 - Disclosure - Basis of Presentation and Significant Accounting Policies - Equity Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesEquitySecuritiesDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Equity Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2401409 - Disclosure - Basis of Presentation and Significant Accounting Policies - Allowance For Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Allowance For Doubtful Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2401410 - Disclosure - Basis of Presentation and Significant Accounting Policies - Reserves For Excess And Obsolete Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesReservesForExcessAndObsoleteInventoriesDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Reserves For Excess And Obsolete Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2401411 - Disclosure - Basis of Presentation and Significant Accounting Policies - Long-Lived Assets including Finite Lived Purchased Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesLongLivedAssetsIncludingFiniteLivedPurchasedIntangibleAssetsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Long-Lived Assets including Finite Lived Purchased Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2401412 - Disclosure - Basis of Presentation and Significant Accounting Policies - Valuation of Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesValuationOfGoodwillDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Valuation of Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2401413 - Disclosure - Basis of Presentation and Significant Accounting Policies - Self-Insured Health Insurance Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesSelfInsuredHealthInsuranceBenefitsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Self-Insured Health Insurance Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2401414 - Disclosure - Basis of Presentation and Significant Accounting Policies - Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesRestrictedCashDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2401415 - Disclosure - Basis of Presentation and Significant Accounting Policies - Debt Issuance Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesDebtIssuanceCostsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Debt Issuance Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2401416 - Disclosure - Basis of Presentation and Significant Accounting Policies - Shipping and Handling Fees and Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesShippingAndHandlingFeesAndCostsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Shipping and Handling Fees and Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2401417 - Disclosure - Basis of Presentation and Significant Accounting Policies - Warranty (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesWarrantyDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Warranty (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2401418 - Disclosure - Basis of Presentation and Significant Accounting Policies - Advertising Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesAdvertisingCostsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Advertising Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2401419 - Disclosure - Basis of Presentation and Significant Accounting Policies - Basic and Diluted Net (Loss) Income Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesBasicAndDilutedNetLossIncomePerShareDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Basic and Diluted Net (Loss) Income Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2401420 - Disclosure - Basis of Presentation and Significant Accounting Policies - Recent Accounting Standards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/BasisOfPresentationAndSignificantAccountingPoliciesRecentAccountingStandardsDetails</Role>
      <ShortName>Basis of Presentation and Significant Accounting Policies - Recent Accounting Standards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - Discontinued Operations - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DiscontinuedOperationsNarrativeDetails</Role>
      <ShortName>Discontinued Operations - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - Discontinued Operations - Financial Results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DiscontinuedOperationsFinancialResultsDetails</Role>
      <ShortName>Discontinued Operations - Financial Results (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2402404 - Disclosure - Discontinued Operations - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DiscontinuedOperationsSupplementalCashFlowInformationDetails</Role>
      <ShortName>Discontinued Operations - Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Revenue - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RevenueDisaggregationOfRevenueDetails</Role>
      <ShortName>Revenue - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - Revenue - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RevenueNarrativeDetails</Role>
      <ShortName>Revenue - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2404404 - Disclosure - Revenue - Changes in Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RevenueChangesInDeferredRevenueDetails</Role>
      <ShortName>Revenue - Changes in Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Merger - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerNarrativeDetails</Role>
      <ShortName>Merger - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2405403 - Disclosure - Merger - Schedule of Consideration Transferred (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerScheduleOfConsiderationTransferredDetails</Role>
      <ShortName>Merger - Schedule of Consideration Transferred (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2405404 - Disclosure - Merger - Summary of Recognized Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerSummaryOfRecognizedAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Merger - Summary of Recognized Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2405405 - Disclosure - Merger - Schedule of Intangible Assets Acquired (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerScheduleOfIntangibleAssetsAcquiredDetails</Role>
      <ShortName>Merger - Schedule of Intangible Assets Acquired (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2405406 - Disclosure - Merger - Schedule of Revenue and Net Loss of ATRM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerScheduleOfRevenueAndNetLossOfAtrmDetails</Role>
      <ShortName>Merger - Schedule of Revenue and Net Loss of ATRM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2405407 - Disclosure - Merger - Schedule of Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerScheduleOfCashFlowInformationDetails</Role>
      <ShortName>Merger - Schedule of Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2405408 - Disclosure - Merger - Schedule of Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/MergerScheduleOfProFormaInformationDetails</Role>
      <ShortName>Merger - Schedule of Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Supplementary Balance Sheet Information - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SupplementaryBalanceSheetInformationDetails</Role>
      <ShortName>Supplementary Balance Sheet Information - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/SupplementaryBalanceSheetInformationTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - Fair Value Measurements Schedule of fair value measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/FairValueMeasurementsScheduleOfFairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements Schedule of fair value measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Fair Value Measurements - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/FairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair Value Measurements - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Goodwill Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/GoodwillNarrativeDetails</Role>
      <ShortName>Goodwill Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - Goodwill Schedule of changes in goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/GoodwillScheduleOfChangesInGoodwillDetails</Role>
      <ShortName>Goodwill Schedule of changes in goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - Debt - Summary of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtSummaryOfDebtDetails</Role>
      <ShortName>Debt - Summary of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - Debt - Digirad Loan Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtDigiradLoanAgreementsDetails</Role>
      <ShortName>Debt - Digirad Loan Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2409404 - Disclosure - Debt - ATRN Loan Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtAtrnLoanAgreementsDetails</Role>
      <ShortName>Debt - ATRN Loan Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - Debt - KBS Loan Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtKbsLoanAgreementDetails</Role>
      <ShortName>Debt - KBS Loan Agreement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2409406 - Disclosure - Debt - EBGL Line of Credit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtEbglLineOfCreditDetails</Role>
      <ShortName>Debt - EBGL Line of Credit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2409407 - Disclosure - Debt - Star and EBGL Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtStarAndEbglLoansDetails</Role>
      <ShortName>Debt - Star and EBGL Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2409408 - Disclosure - Debt - Debt Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/DebtDebtMaturitiesDetails</Role>
      <ShortName>Debt - Debt Maturities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Leases - Schedule of Lease Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesScheduleOfLeaseExpensesDetails</Role>
      <ShortName>Leases - Schedule of Lease Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2411404 - Disclosure - Leases - Schedule of Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesScheduleOfSupplementalCashFlowInformationDetails</Role>
      <ShortName>Leases - Schedule of Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2411405 - Disclosure - Leases - Schedule of Supplemental Balance Sheet Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesScheduleOfSupplementalBalanceSheetInformationDetails</Role>
      <ShortName>Leases - Schedule of Supplemental Balance Sheet Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2411406 - Disclosure - Leases - Schedule of Future Minimum Lease Payments, Lessee (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesScheduleOfFutureMinimumLeasePaymentsLesseeDetails</Role>
      <ShortName>Leases - Schedule of Future Minimum Lease Payments, Lessee (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Leases - Lease Payments to be Received (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/LeasesLeasePaymentsToBeReceivedDetails</Role>
      <ShortName>Leases - Lease Payments to be Received (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Share Based Compensation - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensationNarrativeDetails</Role>
      <ShortName>Share Based Compensation - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Share Based Compensation - Stock Options Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensationStockOptionsActivityDetails</Role>
      <ShortName>Share Based Compensation - Stock Options Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - Share Based Compensation - Restricted Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensationRestrictedStockActivityDetails</Role>
      <ShortName>Share Based Compensation - Restricted Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2412405 - Disclosure - Share Based Compensation - Allocation of Share-based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/ShareBasedCompensationAllocationOfShareBasedCompensationExpenseDetails</Role>
      <ShortName>Share Based Compensation - Allocation of Share-based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - Income Taxes - Income Tax Provision (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesIncomeTaxProvisionDetails</Role>
      <ShortName>Income Taxes - Income Tax Provision (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - Income Taxes - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2413404 - Disclosure - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesReconciliationOfEffectiveIncomeTaxRateDetails</Role>
      <ShortName>Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2413405 - Disclosure - Income Taxes - Net Deferred Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesNetDeferredTaxAssetsDetails</Role>
      <ShortName>Income Taxes - Net Deferred Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>2413406 - Disclosure - Income Taxes - Unrecognized Tax Benefit Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/IncomeTaxesUnrecognizedTaxBenefitActivityDetails</Role>
      <ShortName>Income Taxes - Unrecognized Tax Benefit Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>2414401 - Disclosure - Employee Retirement Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/EmployeeRetirementPlanDetails</Role>
      <ShortName>Employee Retirement Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/EmployeeRetirementPlan</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>2415401 - Disclosure - Related Party Transaction (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RelatedPartyTransactionDetails</Role>
      <ShortName>Related Party Transaction (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/RelatedPartyTransaction</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>2416402 - Disclosure - Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SegmentsDetails</Role>
      <ShortName>Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/SegmentsTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>2417402 - Disclosure - Quarterly Financial Information (Unaudited) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/QuarterlyFinancialInformationUnauditedDetails</Role>
      <ShortName>Quarterly Financial Information (Unaudited) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/QuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>2418402 - Disclosure - Redeemable Preferred Stock - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RedeemablePreferredStockNarrativeDetails</Role>
      <ShortName>Redeemable Preferred Stock - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>2418403 - Disclosure - Redeemable Preferred Stock - Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/RedeemablePreferredStockActivityDetails</Role>
      <ShortName>Redeemable Preferred Stock - Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="digirad-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>2419401 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.digirad.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.digirad.com/role/SubsequentEvents</ParentRole>
      <Position>106</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>digirad-20191231.xml</File>
    <File>digirad-20191231.xsd</File>
    <File>digirad-20191231_cal.xml</File>
    <File>digirad-20191231_def.xml</File>
    <File>digirad-20191231_lab.xml</File>
    <File>digirad-20191231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
