<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>372</ContextCount>
  <ElementCount>407</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>121</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995100 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/dei/role/document/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995301 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995302 - Statement - Condensed Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConsolidatedBalanceSheet_Parentheticals</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995303 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995304 - Statement - Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders??? Deficit (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ShareholdersEquityType2or3</Role>
      <ShortName>Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders??? Deficit (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995305 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConsolidatedCashFlow</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995306 - Disclosure - Organization and Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/OrganizationandDescriptionofBusiness</Role>
      <ShortName>Organization and Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995307 - Disclosure - Liquidity and Going Concern</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/LiquidityandGoingConcern</Role>
      <ShortName>Liquidity and Going Concern</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995308 - Disclosure - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SignificantAccountingPolicies</Role>
      <ShortName>Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995309 - Disclosure - Reverse Merger</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ReverseMerger</Role>
      <ShortName>Reverse Merger</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995310 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995311 - Disclosure - Significant Balance Sheet Components</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponents</Role>
      <ShortName>Significant Balance Sheet Components</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995312 - Disclosure - Share-Based Termination Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiability</Role>
      <ShortName>Share-Based Termination Liability</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995313 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/Borrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995314 - Disclosure - Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/Warrants</Role>
      <ShortName>Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995315 - Disclosure - Convertible Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConvertiblePreferredStock</Role>
      <ShortName>Convertible Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995316 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/StockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995317 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995318 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995319 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995320 - Disclosure - Basic and Diluted Net Income (Loss) per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/BasicandDilutedNetIncomeLossperShare</Role>
      <ShortName>Basic and Diluted Net Income (Loss) per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995321 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>996000 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/AccountingPoliciesByPolicy</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantAccountingPolicies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>996001 - Disclosure - Reverse Merger (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ReverseMergerTables</Role>
      <ShortName>Reverse Merger (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ReverseMerger</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>996002 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurements</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>996003 - Disclosure - Significant Balance Sheet Components (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsTables</Role>
      <ShortName>Significant Balance Sheet Components (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponents</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>996004 - Disclosure - Share-Based Termination Liability (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiabilityTables</Role>
      <ShortName>Share-Based Termination Liability (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiability</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>996005 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/BorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/Borrowings</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>996006 - Disclosure - Warrants (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/WarrantsTables</Role>
      <ShortName>Warrants (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/Warrants</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>996007 - Disclosure - Convertible Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConvertiblePreferredStockTables</Role>
      <ShortName>Convertible Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ConvertiblePreferredStock</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>996008 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>996009 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/Leases</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>996010 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/CommitmentsandContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/CommitmentsandContingencies</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>996011 - Disclosure - Basic and Diluted Net Income (Loss) per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/BasicandDilutedNetIncomeLossperShareTables</Role>
      <ShortName>Basic and Diluted Net Income (Loss) per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BasicandDilutedNetIncomeLossperShare</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>996012 - Disclosure - Organization and Description of Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/OrganizationandDescriptionofBusinessDetails</Role>
      <ShortName>Organization and Description of Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/OrganizationandDescriptionofBusiness</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>996013 - Disclosure - Liquidity and Going Concern (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/LiquidityandGoingConcernDetails</Role>
      <ShortName>Liquidity and Going Concern (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/LiquidityandGoingConcern</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>996014 - Disclosure - Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SignificantAccountingPoliciesDetails</Role>
      <ShortName>Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>996015 - Disclosure - Reverse Merger (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ReverseMergerDetails</Role>
      <ShortName>Reverse Merger (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ReverseMergerTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>996016 - Disclosure - Reverse Merger (Details) - Schedule of Merger and After Redemptions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofMergerandAfterRedemptionsTable</Role>
      <ShortName>Reverse Merger (Details) - Schedule of Merger and After Redemptions</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ReverseMergerTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>996017 - Disclosure - Reverse Merger (Details) - Schedule of Consummation of the Merger</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofConsummationoftheMergerTable</Role>
      <ShortName>Reverse Merger (Details) - Schedule of Consummation of the Merger</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ReverseMergerTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>996018 - Disclosure - Fair Value Measurements (Details) - Schedule of Assets and Liabilities Measured at Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofAssetsandLiabilitiesMeasuredatFairValueTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Assets and Liabilities Measured at Fair Value</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>996019 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of Level 3 Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofLevel3LiabilitiesTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of Level 3 Liabilities</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>996020 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of the Public Placement Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofthePublicPlacementWarrantsTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of the Public Placement Warrants</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>996021 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of Convertible Notes</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofConvertibleNotesTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of Convertible Notes</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>996022 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of Related Party Convertible Notes</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofRelatedPartyConvertibleNotesTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of Related Party Convertible Notes</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>996023 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of Share-Based Termination Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofShareBasedTerminationLiabilityTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of Share-Based Termination Liability</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>996024 - Disclosure - Fair Value Measurements (Details) - Schedule of Change in Fair Value of Convertible Preferred Stock Warrants Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofChangeinFairValueofConvertiblePreferredStockWarrantsLiabilityTable</Role>
      <ShortName>Fair Value Measurements (Details) - Schedule of Change in Fair Value of Convertible Preferred Stock Warrants Liability</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>996025 - Disclosure - Significant Balance Sheet Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsDetails</Role>
      <ShortName>Significant Balance Sheet Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>996026 - Disclosure - Significant Balance Sheet Components (Details) - Schedule of Prepaid Expenses and Other Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofPrepaidExpensesandOtherCurrentAssetsTable</Role>
      <ShortName>Significant Balance Sheet Components (Details) - Schedule of Prepaid Expenses and Other Current Assets</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>996027 - Disclosure - Significant Balance Sheet Components (Details) - Schedule of Other Non-Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofOtherNonCurrentAssetsTable</Role>
      <ShortName>Significant Balance Sheet Components (Details) - Schedule of Other Non-Current Assets</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>996028 - Disclosure - Significant Balance Sheet Components (Details) - Schedule of Accrued Expenses and Other Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofAccruedExpensesandOtherCurrentLiabilitiesTable</Role>
      <ShortName>Significant Balance Sheet Components (Details) - Schedule of Accrued Expenses and Other Current Liabilities</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SignificantBalanceSheetComponentsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>996029 - Disclosure - Share-Based Termination Liability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiabilityDetails</Role>
      <ShortName>Share-Based Termination Liability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiabilityTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>996030 - Disclosure - Share-Based Termination Liability (Details) - Schedule of Fair Value of the Share-Based Lease Termination Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofFairValueoftheShareBasedLeaseTerminationLiabilityTable</Role>
      <ShortName>Share-Based Termination Liability (Details) - Schedule of Fair Value of the Share-Based Lease Termination Liability</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ShareBasedTerminationLiabilityTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>996031 - Disclosure - Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/BorrowingsDetails</Role>
      <ShortName>Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BorrowingsTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>996032 - Disclosure - Borrowings (Details) - Schedule of Stated Maturities and Future Scheduled Principal Repayments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofStatedMaturitiesandFutureScheduledPrincipalRepaymentsTable</Role>
      <ShortName>Borrowings (Details) - Schedule of Stated Maturities and Future Scheduled Principal Repayments</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BorrowingsTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996033 - Disclosure - Borrowings (Details) - Schedule of Fair Value of the Convertible Notes</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofFairValueoftheConvertibleNotesTable</Role>
      <ShortName>Borrowings (Details) - Schedule of Fair Value of the Convertible Notes</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BorrowingsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996034 - Disclosure - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/WarrantsDetails</Role>
      <ShortName>Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/WarrantsTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996035 - Disclosure - Warrants (Details) - Schedule of Fair Value Measurement Warrant Liability Input</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofFairValueMeasurementWarrantLiabilityInputTable</Role>
      <ShortName>Warrants (Details) - Schedule of Fair Value Measurement Warrant Liability Input</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/WarrantsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996036 - Disclosure - Warrants (Details) - Schedule of Private Warrants Outstanding</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofPrivateWarrantsOutstandingTable</Role>
      <ShortName>Warrants (Details) - Schedule of Private Warrants Outstanding</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/WarrantsTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996037 - Disclosure - Convertible Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ConvertiblePreferredStockDetails</Role>
      <ShortName>Convertible Preferred Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ConvertiblePreferredStockTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996038 - Disclosure - Convertible Preferred Stock (Details) - Schedule of Authorized, Issued, and Outstanding Convertible Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofAuthorizedIssuedandOutstandingConvertiblePreferredStockTable</Role>
      <ShortName>Convertible Preferred Stock (Details) - Schedule of Authorized, Issued, and Outstanding Convertible Preferred Stock</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/ConvertiblePreferredStockTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996039 - Disclosure - Stock-Based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/StockBasedCompensationDetails</Role>
      <ShortName>Stock-Based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996040 - Disclosure - Stock-Based Compensation (Details) - Schedule of Common Stock Reserved for Issuance</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofCommonStockReservedforIssuanceTable</Role>
      <ShortName>Stock-Based Compensation (Details) - Schedule of Common Stock Reserved for Issuance</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>996041 - Disclosure - Stock-Based Compensation (Details) - Schedule of Option Award Activity for Service-Based Stock Options Granted</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofOptionAwardActivityforServiceBasedStockOptionsGrantedTable</Role>
      <ShortName>Stock-Based Compensation (Details) - Schedule of Option Award Activity for Service-Based Stock Options Granted</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>996042 - Disclosure - Stock-Based Compensation (Details) - Schedule of RSU Activity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofRSUActivityTable</Role>
      <ShortName>Stock-Based Compensation (Details) - Schedule of RSU Activity</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996043 - Disclosure - Stock-Based Compensation (Details) - Schedule of Stock-Based Compensation Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofStockBasedCompensationExpenseTable</Role>
      <ShortName>Stock-Based Compensation (Details) - Schedule of Stock-Based Compensation Expense</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/StockBasedCompensationTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996044 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/IncomeTaxes</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996045 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/LeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/LeasesTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996046 - Disclosure - Leases (Details) - Schedule of Net Lease Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofNetLeaseCostsTable</Role>
      <ShortName>Leases (Details) - Schedule of Net Lease Costs</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/LeasesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996047 - Disclosure - Leases (Details) - Schedule of Operating Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofOperatingLeasesTable</Role>
      <ShortName>Leases (Details) - Schedule of Operating Leases</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/LeasesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996048 - Disclosure - Leases (Details) - Schedule of Supplemental Information of Cash Flow</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofSupplementalInformationofCashFlowTable</Role>
      <ShortName>Leases (Details) - Schedule of Supplemental Information of Cash Flow</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/LeasesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996049 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/CommitmentsandContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996050 - Disclosure - Commitments and Contingencies (Details) - Schedule of Restructuring Liability</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofRestructuringLiabilityTable</Role>
      <ShortName>Commitments and Contingencies (Details) - Schedule of Restructuring Liability</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996051 - Disclosure - Basic and Diluted Net Income (Loss) per Share (Details) - Schedule of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofBasicandDilutedNetIncomeLossperShareAttributabletoCommonStockholdersTable</Role>
      <ShortName>Basic and Diluted Net Income (Loss) per Share (Details) - Schedule of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BasicandDilutedNetIncomeLossperShareTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996052 - Disclosure - Basic and Diluted Net Income (Loss) per Share (Details) - Schedule of Anti-Dilutive Effect on Net Income (Loss) per Share Attributable to Common Stockholders</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/ScheduleofAntiDilutiveEffectonNetIncomeLossperShareAttributabletoCommonStockholdersTable</Role>
      <ShortName>Basic and Diluted Net Income (Loss) per Share (Details) - Schedule of Anti-Dilutive Effect on Net Income (Loss) per Share Attributable to Common Stockholders</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/BasicandDilutedNetIncomeLossperShareTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="ea0220630-10q_bolt.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996053 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.goldenarrowspac.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.goldenarrowspac.com/role/SubsequentEvents</ParentRole>
      <Position>78</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ea0220630-10q_bolt.htm">ea0220630-10q_bolt.htm</File>
    <File>gamc-20240930.xsd</File>
    <File>gamc-20240930_cal.xml</File>
    <File>gamc-20240930_def.xml</File>
    <File>gamc-20240930_lab.xml</File>
    <File>gamc-20240930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1012">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="34">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
