<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>283</ContextCount>
  <ElementCount>230</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>51</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Condensed Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-balance-sheets-current-period-unaudited</Role>
      <ShortName>Condensed Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Condensed Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Condensed Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Condensed Statements of Operations and Comprehensive Loss (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-statements-of-operations-and-comprehensive-loss-unaudited</Role>
      <ShortName>Condensed Statements of Operations and Comprehensive Loss (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-statements-of-convertible-preferred-stock-and-stockholders-equity-deficit-unaudited</Role>
      <ShortName>Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-statements-of-convertible-preferred-stock-and-stockholders-equity-deficit-unaudited-parentheticals</Role>
      <ShortName>Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Statement - Condensed Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-condensed-statements-of-cash-flows-unaudited</Role>
      <ShortName>Condensed Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 1 - Organization and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-1-organization-and-basis-of-presentation</Role>
      <ShortName>Note 1 - Organization and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 2 - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-2-summary-of-significant-accounting-policies</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 3 - Marketable Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities</Role>
      <ShortName>Note 3 - Marketable Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 4 - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements</Role>
      <ShortName>Note 4 - Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 5 - Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-5-accrued-expenses</Role>
      <ShortName>Note 5 - Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 6 - Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 7 - License Agreement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-7-license-agreement</Role>
      <ShortName>Note 7 - License Agreement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 8 - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-</Role>
      <ShortName>Note 8 - Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 9 - Net Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-9-net-loss-per-share</Role>
      <ShortName>Note 9 - Net Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 10 - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting</Role>
      <ShortName>Note 10 - Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.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>18</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995463 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-2-summary-of-significant-accounting-policies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995464 - Disclosure - Note 3 - Marketable Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities-tables</Role>
      <ShortName>Note 3 - Marketable Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995465 - Disclosure - Note 4 - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements-tables</Role>
      <ShortName>Note 4 - Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995466 - Disclosure - Note 5 - Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-5-accrued-expenses-tables</Role>
      <ShortName>Note 5 - Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-5-accrued-expenses</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995467 - Disclosure - Note 6 - Stockholders' Equity (Deficit) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995468 - Disclosure - Note 8 - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-tables</Role>
      <ShortName>Note 8 - Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995469 - Disclosure - Note 9 - Net Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-9-net-loss-per-share-tables</Role>
      <ShortName>Note 9 - Net Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-9-net-loss-per-share</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995470 - Disclosure - Note 10 - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting-tables</Role>
      <ShortName>Note 10 - Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995471 - Disclosure - Note 1 - Organization and Basis of Presentation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-1-organization-and-basis-of-presentation-details-textual</Role>
      <ShortName>Note 1 - Organization and Basis of Presentation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-1-organization-and-basis-of-presentation</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995472 - Disclosure - Note 3 - Marketable Securities (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities-details-textual</Role>
      <ShortName>Note 3 - Marketable Securities (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities-tables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995473 - Disclosure - Note 3 - Marketable Securities - Amortized Costs and Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities-amortized-costs-and-fair-value-details</Role>
      <ShortName>Note 3 - Marketable Securities - Amortized Costs and Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995474 - Disclosure - Note 3 - Marketable Securities - Schedule of Securities in Unrealized Loss Position (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-3-marketable-securities-schedule-of-securities-in-unrealized-loss-position-details</Role>
      <ShortName>Note 3 - Marketable Securities - Schedule of Securities in Unrealized Loss Position (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995475 - Disclosure - Note 4 - Fair Value Measurements (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements-details-textual</Role>
      <ShortName>Note 4 - Fair Value Measurements (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements-tables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995476 - Disclosure - Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-4-fair-value-measurements-assets-and-liabilities-measured-at-fair-value-on-recurring-basis-details</Role>
      <ShortName>Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995477 - Disclosure - Note 5 - Accrued Expenses - Schedule of Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-5-accrued-expenses-schedule-of-accrued-expenses-details</Role>
      <ShortName>Note 5 - Accrued Expenses - Schedule of Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995478 - Disclosure - Note 6 - Stockholders' Equity (Deficit) (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-details-textual</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995479 - Disclosure - Note 6 - Stockholders' Equity (Deficit) - Schedule of Common Stock Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-schedule-of-common-stock-outstanding-details</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) - Schedule of Common Stock Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995480 - Disclosure - Note 6 - Stockholders' Equity (Deficit) - Common Stock Reserved for Future Issuance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-common-stock-reserved-for-future-issuance-details</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) - Common Stock Reserved for Future Issuance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995481 - Disclosure - Note 6 - Stockholders' Equity (Deficit) - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-stock-option-activity-details</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995482 - Disclosure - Note 6 - Stockholders' Equity (Deficit) - Weighted-average Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-weightedaverage-assumptions-details</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) - Weighted-average Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995483 - Disclosure - Note 6 - Stockholders' Equity (Deficit) - Stock-based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-stockbased-compensation-details</Role>
      <ShortName>Note 6 - Stockholders' Equity (Deficit) - Stock-based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-6-stockholders-equity-deficit-tables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995484 - Disclosure - Note 7 - License Agreement (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-7-license-agreement-details-textual</Role>
      <ShortName>Note 7 - License Agreement (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-7-license-agreement</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995485 - Disclosure - Note 8 - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-details-textual</Role>
      <ShortName>Note 8 - Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-tables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995486 - Disclosure - Note 8 - Commitments and Contingencies - Operating Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-operating-lease-costs-details</Role>
      <ShortName>Note 8 - Commitments and Contingencies - Operating Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995487 - Disclosure - Note 8 - Commitments and Contingencies - Schedule of Maturity Of Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-8-commitments-and-contingencies-schedule-of-maturity-of-leases-details</Role>
      <ShortName>Note 8 - Commitments and Contingencies - Schedule of Maturity Of Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995488 - Disclosure - Note 9 - Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-9-net-loss-per-share-computation-of-basic-and-diluted-net-loss-per-share-details</Role>
      <ShortName>Note 9 - Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995489 - Disclosure - Note 9 - Net Loss Per Share - Anti-dilutive Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-9-net-loss-per-share-antidilutive-securities-details</Role>
      <ShortName>Note 9 - Net Loss Per Share - Anti-dilutive Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995490 - Disclosure - Note 10 - Segment Reporting (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting-details-textual</Role>
      <ShortName>Note 10 - Segment Reporting (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting-tables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ctnm20250930_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995491 - Disclosure - Note 10 - Segment Reporting - Schedule of Segment Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.contineum-tx.com/20250930/role/statement-note-10-segment-reporting-schedule-of-segment-financial-information-details</Role>
      <ShortName>Note 10 - Segment Reporting - Schedule of Segment Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ctnm-20250930.xsd</File>
    <File>ctnm-20250930_cal.xml</File>
    <File>ctnm-20250930_def.xml</File>
    <File>ctnm-20250930_lab.xml</File>
    <File>ctnm-20250930_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ctnm20250930_10q.htm">ctnm20250930_10q.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>pipeline2025october.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="825">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="28">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
