<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>207</ContextCount>
  <ElementCount>271</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>28</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000100 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>010000 - Statement - CONSOLIDATED BALANCE SHEETS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedBalanceSheetsFy</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (FY)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>010100 - Statement - CONSOLIDATED BALANCE SHEETS (FY) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedBalanceSheetsFyParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (FY) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>020000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfOperationsFy</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS (FY)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>030000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityFy</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (FY)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>030100 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (FY) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityFyParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (FY) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>040000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfCashFlowsFy</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (FY)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>050000 - Statement - CONSOLIDATED BALANCE SHEETS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedBalanceSheetsQ1</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Q1)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>050100 - Statement - CONSOLIDATED BALANCE SHEETS (Q1) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedBalanceSheetsQ1Parenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Q1) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>060000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfOperationsQ1</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS (Q1)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>070000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityQ1</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Q1)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>080000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ConsolidatedStatementsOfCashFlowsQ1</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (Q1)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>090100 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsFy</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>090200 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RestatementOfPreviouslyIssuedFinancialStatementsFy</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>090300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesFy</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>090400 - Disclosure - INITIAL PUBLIC OFFERING (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/InitialPublicOfferingFy</Role>
      <ShortName>INITIAL PUBLIC OFFERING (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>090500 - Disclosure - PRIVATE PLACEMENT (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/PrivatePlacementFy</Role>
      <ShortName>PRIVATE PLACEMENT (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>090600 - Disclosure - RELATED PARTY TRANSACTIONS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsFy</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>090700 - Disclosure - COMMITMENTS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/CommitmentsFy</Role>
      <ShortName>COMMITMENTS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>090800 - Disclosure - SHAREHOLDERS' EQUITY (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityFy</Role>
      <ShortName>SHAREHOLDERS' EQUITY (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>090900 - Disclosure - WARRANT LIABILITY (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/WarrantLiabilityFy</Role>
      <ShortName>WARRANT LIABILITY (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>091000 - Disclosure - FAIR VALUE MEASUREMENTS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsFy</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>091100 - Disclosure - SUBSEQUENT EVENTS (FY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SubsequentEventsFy</Role>
      <ShortName>SUBSEQUENT EVENTS (FY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>091200 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsQ1</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>091300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesQ1</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>091400 - Disclosure - INITIAL PUBLIC OFFERING (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/InitialPublicOfferingQ1</Role>
      <ShortName>INITIAL PUBLIC OFFERING (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>091500 - Disclosure - PRIVATE PLACEMENT (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/PrivatePlacementQ1</Role>
      <ShortName>PRIVATE PLACEMENT (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>091600 - Disclosure - RELATED PARTY TRANSACTIONS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsQ1</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>091700 - Disclosure - COMMITMENTS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/CommitmentsQ1</Role>
      <ShortName>COMMITMENTS (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>091800 - Disclosure - SHAREHOLDERS' EQUITY (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityQ1</Role>
      <ShortName>SHAREHOLDERS' EQUITY (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>091900 - Disclosure - WARRANT LIABILITY (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/WarrantLiabilityQ1</Role>
      <ShortName>WARRANT LIABILITY (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>092000 - Disclosure - FAIR VALUE MEASUREMENTS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsQ1</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>092100 - Disclosure - SUBSEQUENT EVENTS (Q1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SubsequentEventsQ1</Role>
      <ShortName>SUBSEQUENT EVENTS (Q1)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY) (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesFyPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY) (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>101300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1) (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesQ1Policies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1) (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>110200 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RestatementOfPreviouslyIssuedFinancialStatementsFyTables</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/RestatementOfPreviouslyIssuedFinancialStatementsFy</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>110300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesFyTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (FY) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesFy</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>111000 - Disclosure - FAIR VALUE MEASUREMENTS (FY) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsFyTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (FY) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/FairValueMeasurementsFy</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>111300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesQ1Tables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Q1) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesFy</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>112000 - Disclosure - FAIR VALUE MEASUREMENTS (Q1) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsQ1Tables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Q1) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/FairValueMeasurementsFy</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>120100 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsFyDetails</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsFy</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>120102 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS, Liquidity and Going Concern (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsLiquidityAndGoingConcernFyDetails</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS, Liquidity and Going Concern (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>120200 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RestatementOfPreviouslyIssuedFinancialStatementsFyDetails</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/RestatementOfPreviouslyIssuedFinancialStatementsFyTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>120300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsFyDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>120302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesIncomeTaxesFyDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>120304 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Net Income (Loss) Per Ordinary Share (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesNetIncomeLossPerOrdinaryShareFyDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Net Income (Loss) Per Ordinary Share (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>120400 - Disclosure - INITIAL PUBLIC OFFERING (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/InitialPublicOfferingFyDetails</Role>
      <ShortName>INITIAL PUBLIC OFFERING (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/InitialPublicOfferingFy</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>120500 - Disclosure - PRIVATE PLACEMENT (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/PrivatePlacementFyDetails</Role>
      <ShortName>PRIVATE PLACEMENT (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/PrivatePlacementFy</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>120600 - Disclosure - RELATED PARTY TRANSACTIONS, Founder Shares (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsFounderSharesFyDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Founder Shares (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>120602 - Disclosure - RELATED PARTY TRANSACTIONS, Administrative Services Agreement (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsAdministrativeServicesAgreementFyDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Administrative Services Agreement (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>120604 - Disclosure - RELATED PARTY TRANSACTIONS, Promissory Note (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsPromissoryNoteFyDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Promissory Note (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>120606 - Disclosure - RELATED PARTY TRANSACTIONS, Related Party Loans (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsRelatedPartyLoansFyDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Related Party Loans (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>120700 - Disclosure - COMMITMENTS (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/CommitmentsFyDetails</Role>
      <ShortName>COMMITMENTS (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/CommitmentsFy</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>120800 - Disclosure - SHAREHOLDERS' EQUITY, Preferred Shares (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityPreferredSharesFyDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY, Preferred Shares (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>120802 - Disclosure - SHAREHOLDERS' EQUITY, Ordinary Shares (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityOrdinarySharesFyDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY, Ordinary Shares (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>120900 - Disclosure - WARRANT LIABILITY (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/WarrantLiabilityFyDetails</Role>
      <ShortName>WARRANT LIABILITY (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/WarrantLiabilityFy</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>121000 - Disclosure - FAIR VALUE MEASUREMENTS (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsFyDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/FairValueMeasurementsFyTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>121100 - Disclosure - SUBSEQUENT EVENTS (FY) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SubsequentEventsFyDetails</Role>
      <ShortName>SUBSEQUENT EVENTS (FY) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/SubsequentEventsFy</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>121200 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsQ1Details</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsFy</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>121202 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS, Liquidity and Going Concern (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/DescriptionOfOrganizationAndBusinessOperationsLiquidityAndGoingConcernQ1Details</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS, Liquidity and Going Concern (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>121300 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsQ1Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>121302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Warrant Liability (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesWarrantLiabilityQ1Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Warrant Liability (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>121304 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesIncomeTaxesQ1Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>121306 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Net Income (Loss) Per Ordinary Share (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/SummaryOfSignificantAccountingPoliciesNetIncomeLossPerOrdinaryShareQ1Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Net Income (Loss) Per Ordinary Share (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>121400 - Disclosure - INITIAL PUBLIC OFFERING (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/InitialPublicOfferingQ1Details</Role>
      <ShortName>INITIAL PUBLIC OFFERING (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/InitialPublicOfferingFy</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>121500 - Disclosure - PRIVATE PLACEMENT (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/PrivatePlacementQ1Details</Role>
      <ShortName>PRIVATE PLACEMENT (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/PrivatePlacementFy</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>121600 - Disclosure - RELATED PARTY TRANSACTIONS, Founder Shares (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsFounderSharesQ1Details</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Founder Shares (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>121602 - Disclosure - RELATED PARTY TRANSACTIONS, Administrative Services Agreement (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsAdministrativeServicesAgreementQ1Details</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Administrative Services Agreement (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>121604 - Disclosure - RELATED PARTY TRANSACTIONS, Promissory Note (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsPromissoryNoteQ1Details</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Promissory Note (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>121606 - Disclosure - RELATED PARTY TRANSACTIONS, Related Party Loans (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/RelatedPartyTransactionsRelatedPartyLoansQ1Details</Role>
      <ShortName>RELATED PARTY TRANSACTIONS, Related Party Loans (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>121700 - Disclosure - COMMITMENTS (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/CommitmentsQ1Details</Role>
      <ShortName>COMMITMENTS (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/CommitmentsFy</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>121800 - Disclosure - SHAREHOLDERS' EQUITY, Preferred Shares (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityPreferredSharesQ1Details</Role>
      <ShortName>SHAREHOLDERS' EQUITY, Preferred Shares (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>121802 - Disclosure - SHAREHOLDERS' EQUITY, Ordinary Shares (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/ShareholdersEquityOrdinarySharesQ1Details</Role>
      <ShortName>SHAREHOLDERS' EQUITY, Ordinary Shares (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>121900 - Disclosure - WARRANT LIABILITY (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/WarrantLiabilityQ1Details</Role>
      <ShortName>WARRANT LIABILITY (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/WarrantLiabilityFy</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="maps-20210708.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>122000 - Disclosure - FAIR VALUE MEASUREMENTS (Q1) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://silverspikecap.com/role/FairValueMeasurementsQ1Details</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Q1) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://silverspikecap.com/role/FairValueMeasurementsFyTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>maps-20210708.xml</File>
    <File>maps-20210708.xsd</File>
    <File>maps-20210708_cal.xml</File>
    <File>maps-20210708_def.xml</File>
    <File>maps-20210708_lab.xml</File>
    <File>maps-20210708_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
