<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>149</ContextCount>
  <ElementCount>253</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>51</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Statements of Financial Position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/StatementConsolidatedStatementsOfFinancialPosition</Role>
      <ShortName>Consolidated Statements of Financial Position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Statements of Loss and Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/StatementConsolidatedStatementsOfLossAndComprehensiveLoss</Role>
      <ShortName>Consolidated Statements of Loss and Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Statements of Changes in Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00305 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00400 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Description of business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureDescriptionOfBusiness</Role>
      <ShortName>Description of business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Basis of presentation and material accounting policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureBasisOfPresentationAndMaterialAccountingPolicies</Role>
      <ShortName>Basis of presentation and material accounting policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Cash and cash equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCashAndCashEquivalents</Role>
      <ShortName>Cash and cash equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Short-term investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShortTermInvestments</Role>
      <ShortName>Short-term investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Prepaid expenses and deposits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosurePrepaidExpensesAndDeposits</Role>
      <ShortName>Prepaid expenses and deposits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Intangible asset and assets held for sale</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIntangibleAssetAndAssetsHeldForSale</Role>
      <ShortName>Intangible asset and assets held for sale</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Accounts payable and accrued liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureAccountsPayableAndAccruedLiabilities</Role>
      <ShortName>Accounts payable and accrued liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Share capital and Pre-Funded Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrants</Role>
      <ShortName>Share capital and Pre-Funded Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureWarrants</Role>
      <ShortName>Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Stock-based compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-based compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Operating expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureOperatingExpenses</Role>
      <ShortName>Operating expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Commitments and contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Related party transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related party transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Income taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Segmented information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureSegmentedInformation</Role>
      <ShortName>Segmented information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Capital management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCapitalManagement</Role>
      <ShortName>Capital management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Financial instruments and risk management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagement</Role>
      <ShortName>Financial instruments and risk management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11801 - Disclosure - Subsequent events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11901 - Disclosure - Change in presentation currency</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureChangeInPresentationCurrency</Role>
      <ShortName>Change in presentation currency</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>20202 - Disclosure - Basis of presentation and material accounting policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureBasisOfPresentationAndMaterialAccountingPoliciesPolicies</Role>
      <ShortName>Basis of presentation and material accounting policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Cash and cash equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCashAndCashEquivalentsTables</Role>
      <ShortName>Cash and cash equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureCashAndCashEquivalents</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>30403 - Disclosure - Short-term investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShortTermInvestmentsTables</Role>
      <ShortName>Short-term investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureShortTermInvestments</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Prepaid expenses and deposits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosurePrepaidExpensesAndDepositsTables</Role>
      <ShortName>Prepaid expenses and deposits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosurePrepaidExpensesAndDeposits</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Accounts payable and accrued liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables</Role>
      <ShortName>Accounts payable and accrued liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureAccountsPayableAndAccruedLiabilities</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Share capital and Pre-Funded Warrants (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrantsTables</Role>
      <ShortName>Share capital and Pre-Funded Warrants (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrants</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Warrants (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureWarrantsTables</Role>
      <ShortName>Warrants (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureWarrants</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Stock-based compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-based compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Operating expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureOperatingExpensesTables</Role>
      <ShortName>Operating expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureOperatingExpenses</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Commitments and contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Related party transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>Related party transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureRelatedPartyTransactions</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Income taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>31703 - Disclosure - Financial instruments and risk management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagementTables</Role>
      <ShortName>Financial instruments and risk management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagement</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>31903 - Disclosure - Change in presentation currency (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureChangeInPresentationCurrencyTables</Role>
      <ShortName>Change in presentation currency (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureChangeInPresentationCurrency</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40101 - Disclosure - Description of business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureDescriptionOfBusinessDetails</Role>
      <ShortName>Description of business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureDescriptionOfBusiness</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Basis of presentation and material accounting policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureBasisOfPresentationAndMaterialAccountingPoliciesDetails</Role>
      <ShortName>Basis of presentation and material accounting policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureBasisOfPresentationAndMaterialAccountingPoliciesPolicies</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Cash and cash equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCashAndCashEquivalentsDetails</Role>
      <ShortName>Cash and cash equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureCashAndCashEquivalentsTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Short-term investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShortTermInvestmentsDetails</Role>
      <ShortName>Short-term investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureShortTermInvestmentsTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40402 - Disclosure - Short-term investments - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShortTermInvestmentsNarrativeDetails</Role>
      <ShortName>Short-term investments - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Prepaid expenses and deposits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosurePrepaidExpensesAndDepositsDetails</Role>
      <ShortName>Prepaid expenses and deposits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosurePrepaidExpensesAndDepositsTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Intangible asset and assets held for sale (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIntangibleAssetAndAssetsHeldForSaleDetails</Role>
      <ShortName>Intangible asset and assets held for sale (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureIntangibleAssetAndAssetsHeldForSale</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Accounts payable and accrued liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesDetails</Role>
      <ShortName>Accounts payable and accrued liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Share capital and Pre-Funded Warrants - Loss per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrantsLossPerShareDetails</Role>
      <ShortName>Share capital and Pre-Funded Warrants - Loss per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Share capital and Pre-Funded Warrants - Share Capital (Issued and Outstanding) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrantsShareCapitalIssuedAndOutstandingDetails</Role>
      <ShortName>Share capital and Pre-Funded Warrants - Share Capital (Issued and Outstanding) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40803 - Disclosure - Share capital and Pre-Funded Warrants - December 2024 Equity Offering (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrantsDecember2024EquityOfferingDetails</Role>
      <ShortName>Share capital and Pre-Funded Warrants - December 2024 Equity Offering (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40804 - Disclosure - Share capital and Pre-Funded Warrants - Pre-Funded Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureShareCapitalAndPreFundedWarrantsPreFundedWarrantsDetails</Role>
      <ShortName>Share capital and Pre-Funded Warrants - Pre-Funded Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureWarrantsDetails</Role>
      <ShortName>Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureWarrantsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Stock-based compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensationDetails</Role>
      <ShortName>Stock-based compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Stock-based compensation - Stock option transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensationStockOptionTransactionsDetails</Role>
      <ShortName>Stock-based compensation - Stock option transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>41003 - Disclosure - Stock-based compensation - Stock options outstanding by exercise price range (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensationStockOptionsOutstandingByExercisePriceRangeDetails</Role>
      <ShortName>Stock-based compensation - Stock options outstanding by exercise price range (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>41004 - Disclosure - Stock-based compensation - Assumptions and stock based compensation expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureStockBasedCompensationAssumptionsAndStockBasedCompensationExpenseDetails</Role>
      <ShortName>Stock-based compensation - Assumptions and stock based compensation expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Operating expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureOperatingExpensesDetails</Role>
      <ShortName>Operating expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureOperatingExpensesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Commitments and contingencies - Purchase obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCommitmentsAndContingenciesPurchaseObligationsDetails</Role>
      <ShortName>Commitments and contingencies - Purchase obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>41202 - Disclosure - Commitments and contingencies - Contingent milestone, royalty and other research and development commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureCommitmentsAndContingenciesContingentMilestoneRoyaltyAndOtherResearchAndDevelopmentCommitmentsDetails</Role>
      <ShortName>Commitments and contingencies - Contingent milestone, royalty and other research and development commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Related party transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureRelatedPartyTransactionsDetails</Role>
      <ShortName>Related party transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureRelatedPartyTransactionsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41302 - Disclosure - Related party transactions - Key management personnel (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureRelatedPartyTransactionsKeyManagementPersonnelDetails</Role>
      <ShortName>Related party transactions - Key management personnel (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Income taxes - Reconciliation of income taxes at statutory rates with the reported taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxesAtStatutoryRatesWithReportedTaxesDetails</Role>
      <ShortName>Income taxes - Reconciliation of income taxes at statutory rates with the reported taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41402 - Disclosure - Income taxes - Temporary differences not recognized (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIncomeTaxesTemporaryDifferencesNotRecognizedDetails</Role>
      <ShortName>Income taxes - Temporary differences not recognized (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41403 - Disclosure - Income taxes - Non-capital loss carry forward expiration by country (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureIncomeTaxesNonCapitalLossCarryForwardExpirationByCountryDetails</Role>
      <ShortName>Income taxes - Non-capital loss carry forward expiration by country (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41501 - Disclosure - Segmented information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureSegmentedInformationDetails</Role>
      <ShortName>Segmented information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureSegmentedInformation</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>41701 - Disclosure - Financial instruments and risk management - Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagementCreditRiskDetails</Role>
      <ShortName>Financial instruments and risk management - Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>41702 - Disclosure - Financial instruments and risk management - Currency Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagementCurrencyRiskDetails</Role>
      <ShortName>Financial instruments and risk management - Currency Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>41703 - Disclosure - Financial instruments and risk management - Currency Risk sensitivity analyses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureFinancialInstrumentsAndRiskManagementCurrencyRiskSensitivityAnalysesDetails</Role>
      <ShortName>Financial instruments and risk management - Currency Risk sensitivity analyses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>41801 - Disclosure - Subsequent events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="msle-20251231x40f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>41901 - Disclosure - Change in presentation currency (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.satellos.com/role/DisclosureChangeInPresentationCurrencyDetails</Role>
      <ShortName>Change in presentation currency (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.satellos.com/role/DisclosureChangeInPresentationCurrencyTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>msle-20251231.xsd</File>
    <File>msle-20251231_cal.xml</File>
    <File>msle-20251231_def.xml</File>
    <File>msle-20251231_lab.xml</File>
    <File>msle-20251231_pre.xml</File>
    <File doctype="40-F" isDefinitelyFs="true" isIfrs="true" original="msle-20251231x40f.htm">msle-20251231x40f.htm</File>
    <File doctype="40-F" isDefinitelyFs="true" isIfrs="true" original="msle-20251231xex99d2.htm">msle-20251231xex99d2.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>msle-20251231xex99d2001.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="44">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="499">https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
