<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>76</ContextCount>
  <ElementCount>319</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>22</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="f10k2021_unicycivethera.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.uncy.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ConsolidatedBalanceSheet_Parentheticals</Role>
      <ShortName>Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Statements of Stockholders??? (Deficit) Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ShareholdersEquityType2or3</Role>
      <ShortName>Statements of Stockholders??? (Deficit) Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ConsolidatedCashFlow</Role>
      <ShortName>Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Disclosure - Organization and Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/OrganizationandDescriptionofBusiness</Role>
      <ShortName>Organization and Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Significant Agreements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/SignificantAgreements</Role>
      <ShortName>Significant Agreements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Balance Sheet Components</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/BalanceSheetComponents</Role>
      <ShortName>Balance Sheet Components</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Operating Lease</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/OperatingLease</Role>
      <ShortName>Operating Lease</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Stockholders??? (Deficit) Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockholdersDeficitEquity</Role>
      <ShortName>Stockholders??? (Deficit) Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockbasedCompensation</Role>
      <ShortName>Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Net Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/NetLossPerShare</Role>
      <ShortName>Net Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Subsequent Events Through March 29, 2022</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/SubsequentEventsThroughMarch292022</Role>
      <ShortName>Subsequent Events Through March 29, 2022</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/AccountingPoliciesByPolicy</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.uncy.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Balance Sheet Components (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/BalanceSheetComponentsTables</Role>
      <ShortName>Balance Sheet Components (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/BalanceSheetComponents</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Operating Lease (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/OperatingLeaseTables</Role>
      <ShortName>Operating Lease (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/OperatingLease</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Stockholders??? (Deficit) Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockholdersDeficitEquityTables</Role>
      <ShortName>Stockholders??? (Deficit) Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockholdersDeficitEquity</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Stock-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockbasedCompensationTables</Role>
      <ShortName>Stock-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockbasedCompensation</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/IncomeTaxes</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Net Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/NetLossPerShareTables</Role>
      <ShortName>Net Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.uncy.com/role/NetLossPerShare</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Organization and Description of Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/OrganizationandDescriptionofBusinessDetails</Role>
      <ShortName>Organization and Description of Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/OrganizationandDescriptionofBusiness</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/SummaryofSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Significant Agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/SignificantAgreementsDetails</Role>
      <ShortName>Significant Agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/SignificantAgreements</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure -  Balance Sheet Components (Details) - Schedule of prepaid expenses and other current assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofprepaidexpensesandothercurrentassetsTable</Role>
      <ShortName>Balance Sheet Components (Details) - Schedule of prepaid expenses and other current assets</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure -  Balance Sheet Components (Details) - Schedule of property, plant and equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofpropertyplantandequipmentTable</Role>
      <ShortName>Balance Sheet Components (Details) - Schedule of property, plant and equipment</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure -  Balance Sheet Components (Details) - Schedule of accounts payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofaccountspayableTable</Role>
      <ShortName>Balance Sheet Components (Details) - Schedule of accounts payable</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure -  Balance Sheet Components (Details) - Schedule of accrued liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofaccruedliabilitiesTable</Role>
      <ShortName>Balance Sheet Components (Details) - Schedule of accrued liabilities</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Operating Lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/OperatingLeaseDetails</Role>
      <ShortName>Operating Lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/OperatingLeaseTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>034 - Disclosure - Operating Lease (Details) - Schedule of lease liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofleaseliabilitiesTable</Role>
      <ShortName>Operating Lease (Details) - Schedule of lease liabilities</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/OperatingLeaseTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>035 - Disclosure - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/DebtDetails</Role>
      <ShortName>Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/Debt</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>036 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/RelatedPartyTransactions</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>037 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/CommitmentsandContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/CommitmentsandContingencies</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>038 - Disclosure - Stockholders??? (Deficit) Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockholdersDeficitEquityDetails</Role>
      <ShortName>Stockholders??? (Deficit) Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockholdersDeficitEquityTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>039 - Disclosure - Stockholders??? (Deficit) Equity (Details) - Schedule of summarizes activity for warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofsummarizesactivityforwarrantsTable</Role>
      <ShortName>Stockholders??? (Deficit) Equity (Details) - Schedule of summarizes activity for warrants</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockholdersDeficitEquityTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>040 - Disclosure - Stock-based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/StockbasedCompensationDetails</Role>
      <ShortName>Stock-based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockbasedCompensationTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>041 - Disclosure - Stock-based Compensation (Details) - Schedule of summarizes activity for stock options under all plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofsummarizesactivityforstockoptionsunderallplansTable</Role>
      <ShortName>Stock-based Compensation (Details) - Schedule of summarizes activity for stock options under all plans</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockbasedCompensationTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>042 - Disclosure - Stock-based Compensation (Details) - Schedule of company has recorded stock-based compensation expense, allocated by functional</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofcompanyhasrecordedstockbasedcompensationexpenseallocatedbyfunctionalTable</Role>
      <ShortName>Stock-based Compensation (Details) - Schedule of company has recorded stock-based compensation expense, allocated by functional</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockbasedCompensationTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>043 - Disclosure - Stock-based Compensation (Details) - Schedule of fair value of awards granted to employees, directors and non-employees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleoffairvalueofawardsgrantedtoemployeesdirectorsandnonemployeesTable</Role>
      <ShortName>Stock-based Compensation (Details) - Schedule of fair value of awards granted to employees, directors and non-employees</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/StockbasedCompensationTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>044 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/IncomeTaxesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>045 - Disclosure - Income Taxes (Details) - Schedule of reconciliation of the provision for income taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofreconciliationoftheprovisionforincometaxesTable</Role>
      <ShortName>Income Taxes (Details) - Schedule of reconciliation of the provision for income taxes</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/IncomeTaxesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>046 - Disclosure - Income Taxes (Details) - Schedule of significant components of company???s deferred tax assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofsignificantcomponentsofcompanysdeferredtaxassetsTable</Role>
      <ShortName>Income Taxes (Details) - Schedule of significant components of company???s deferred tax assets</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/IncomeTaxesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>047 - Disclosure - Income Taxes (Details) - Schedule of company???s gross unrecognized tax benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofcompanysgrossunrecognizedtaxbenefitsTable</Role>
      <ShortName>Income Taxes (Details) - Schedule of company???s gross unrecognized tax benefits</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/IncomeTaxesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>048 - Disclosure - Net Loss Per Share (Details) - Schedule of computation of basic and diluted net loss per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofcomputationofbasicanddilutednetlosspershareTable</Role>
      <ShortName>Net Loss Per Share (Details) - Schedule of computation of basic and diluted net loss per share</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/NetLossPerShareTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="f10k2021_unicycivethera.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>049 - Disclosure - Net Loss Per Share (Details) - Schedule of potentially dilutive securities were excluded from the computation of diluted net loss per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.uncy.com/role/ScheduleofpotentiallydilutivesecuritieswereexcludedfromthecomputationofdilutednetlosspershareTable</Role>
      <ShortName>Net Loss Per Share (Details) - Schedule of potentially dilutive securities were excluded from the computation of diluted net loss per share</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.uncy.com/role/NetLossPerShareTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" original="f10k2021_unicycivethera.htm">f10k2021_unicycivethera.htm</File>
    <File>f10k2021ex14-1_unicycive.htm</File>
    <File>f10k2021ex23-1_unicycive.htm</File>
    <File>f10k2021ex31-1_unicycive.htm</File>
    <File>f10k2021ex31-2_unicycive.htm</File>
    <File>f10k2021ex32-1_unicycive.htm</File>
    <File>f10k2021ex32-2_unicycive.htm</File>
    <File>f10k2021ex4-4_unicycive.htm</File>
    <File>uncy-20211231.xsd</File>
    <File>uncy-20211231_cal.xml</File>
    <File>uncy-20211231_def.xml</File>
    <File>uncy-20211231_lab.xml</File>
    <File>uncy-20211231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>image_001.jpg</File>
    <File>image_002.jpg</File>
    <File>image_003.jpg</File>
    <File>image_004.jpg</File>
    <File>image_005.jpg</File>
    <File>image_006.jpg</File>
    <File>image_007.jpg</File>
    <File>image_008.jpg</File>
    <File>image_009.jpg</File>
    <File>image_010.jpg</File>
    <File>image_011.jpg</File>
    <File>image_012.jpg</File>
    <File>image_013.jpg</File>
    <File>image_014.jpg</File>
    <File>image_015.jpg</File>
    <File>image_016.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="409">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="38">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
