<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>139</ContextCount>
  <ElementCount>269</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>51</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="nlcp20220331_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.newlake.com/20220331/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Balance Sheets (Current Period Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-consolidated-balance-sheets-current-period-unaudited</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-consolidated-balance-sheets-current-period-unaudited-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-consolidated-statements-of-operations-unaudited</Role>
      <ShortName>Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Consolidated Statements of Changes in Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-consolidated-statements-of-changes-in-equity-unaudited</Role>
      <ShortName>Consolidated Statements of Changes in Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-consolidated-statements-of-cash-flows-unaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006 - Disclosure - Note 1 - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-1-organization</Role>
      <ShortName>Note 1 - Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>007 - Disclosure - Note 2 - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>008 - Disclosure - Note 3 - Real Estate</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-3-real-estate</Role>
      <ShortName>Note 3 - Real Estate</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>009 - Disclosure - Note 4 - Mortgage Loan Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-4-mortgage-loan-receivable</Role>
      <ShortName>Note 4 - Mortgage Loan Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>010 - Disclosure - Note 5 - Loan Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-5-loan-payable</Role>
      <ShortName>Note 5 - Loan Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>011 - Disclosure - Note 6 - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-6-related-party-transactions</Role>
      <ShortName>Note 6 - Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>012 - Disclosure - Note 7 - Noncontrolling Interests</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-7-noncontrolling-interests</Role>
      <ShortName>Note 7 - Noncontrolling Interests</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>013 - Disclosure - Note 8 - Stock Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation</Role>
      <ShortName>Note 8 - Stock Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>014 - Disclosure - Note 9 - Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-9-warrants</Role>
      <ShortName>Note 9 - Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>015 - Disclosure - Note 10 - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-10-earnings-per-share</Role>
      <ShortName>Note 10 - Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>016 - Disclosure - Note 11 - Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-11-preferred-stock</Role>
      <ShortName>Note 11 - Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>017 - Disclosure - Note 12 - Common Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-12-common-stock</Role>
      <ShortName>Note 12 - Common Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>018 - Disclosure - Note 13 - Common Dividends, Dividend Equivalents and Distributions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions</Role>
      <ShortName>Note 13 - Common Dividends, Dividend Equivalents and Distributions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>019 - Disclosure - Note 14 - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-14-fair-value-measurements</Role>
      <ShortName>Note 14 - Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020 - Disclosure - Note 15 - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-15-commitments-and-contingencies</Role>
      <ShortName>Note 15 - Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>021 - Disclosure - Note 16 - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-16-subsequent-events</Role>
      <ShortName>Note 16 - Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>022 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>023 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies-tables</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>024 - Disclosure - Note 3 - Real Estate (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-3-real-estate-tables</Role>
      <ShortName>Note 3 - Real Estate (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-3-real-estate</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>025 - Disclosure - Note 7 - Noncontrolling Interests (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-7-noncontrolling-interests-tables</Role>
      <ShortName>Note 7 - Noncontrolling Interests (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-7-noncontrolling-interests</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>026 - Disclosure - Note 8 - Stock Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-tables</Role>
      <ShortName>Note 8 - Stock Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>027 - Disclosure - Note 9 - Warrants (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-9-warrants-tables</Role>
      <ShortName>Note 9 - Warrants (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-9-warrants</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>028 - Disclosure - Note 10 - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-10-earnings-per-share-tables</Role>
      <ShortName>Note 10 - Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-10-earnings-per-share</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>029 - Disclosure - Note 13 - Common Dividends, Dividend Equivalents and Distributions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions-tables</Role>
      <ShortName>Note 13 - Common Dividends, Dividend Equivalents and Distributions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>030 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies-details-textual</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies-tables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>031 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Tenants in Portfolio that Represents the Largest Percentage of Total Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-2-summary-of-significant-accounting-policies-tenants-in-portfolio-that-represents-the-largest-percentage-of-total-revenue-details</Role>
      <ShortName>Note 2 - Summary of Significant Accounting Policies - Tenants in Portfolio that Represents the Largest Percentage of Total Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>032 - Disclosure - Note 3 - Real Estate (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-3-real-estate-details-textual</Role>
      <ShortName>Note 3 - Real Estate (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-3-real-estate-tables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>033 - Disclosure - Note 3 - Real Estate - Future Amortization Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-3-real-estate-future-amortization-expense-details</Role>
      <ShortName>Note 3 - Real Estate - Future Amortization Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>034 - Disclosure - Note 3 - Real Estate - Future Contractual Minimum Rent (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-3-real-estate-future-contractual-minimum-rent-details</Role>
      <ShortName>Note 3 - Real Estate - Future Contractual Minimum Rent (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>035 - Disclosure - Note 4 - Mortgage Loan Receivable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-4-mortgage-loan-receivable-details-textual</Role>
      <ShortName>Note 4 - Mortgage Loan Receivable (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-4-mortgage-loan-receivable</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>036 - Disclosure - Note 5 - Loan Payable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-5-loan-payable-details-textual</Role>
      <ShortName>Note 5 - Loan Payable (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-5-loan-payable</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>037 - Disclosure - Note 6 - Related Party Transactions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-6-related-party-transactions-details-textual</Role>
      <ShortName>Note 6 - Related Party Transactions (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-6-related-party-transactions</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>038 - Disclosure - Note 7 - Noncontrolling Interests - Noncontrolling Interest Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-7-noncontrolling-interests-noncontrolling-interest-activity-details</Role>
      <ShortName>Note 7 - Noncontrolling Interests - Noncontrolling Interest Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>039 - Disclosure - Note 8 - Stock Based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-details-textual</Role>
      <ShortName>Note 8 - Stock Based Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-tables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>040 - Disclosure - Note 8 - Stock Based Compensation - Unvested Restricted Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-unvested-restricted-stock-activity-details</Role>
      <ShortName>Note 8 - Stock Based Compensation - Unvested Restricted Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>041 - Disclosure - Note 8 - Stock Based Compensation - Unvested Performance Stock Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-unvested-performance-stock-activity-details</Role>
      <ShortName>Note 8 - Stock Based Compensation - Unvested Performance Stock Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>042 - Disclosure - Note 8 - Stock Based Compensation - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-8-stock-based-compensation-stock-option-activity-details</Role>
      <ShortName>Note 8 - Stock Based Compensation - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>043 - Disclosure - Note 9 - Warrants (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-9-warrants-details-textual</Role>
      <ShortName>Note 9 - Warrants (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-9-warrants-tables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>044 - Disclosure - Note 9 - Warrants - Warrant Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-9-warrants-warrant-activity-details</Role>
      <ShortName>Note 9 - Warrants - Warrant Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>045 - Disclosure - Note 10 - Earnings Per Share - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-10-earnings-per-share-earnings-per-share-details</Role>
      <ShortName>Note 10 - Earnings Per Share - Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>046 - Disclosure - Note 11 - Preferred Stock (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-11-preferred-stock-details-textual</Role>
      <ShortName>Note 11 - Preferred Stock (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-11-preferred-stock</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>047 - Disclosure - Note 12 - Common Stock (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-12-common-stock-details-textual</Role>
      <ShortName>Note 12 - Common Stock (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-12-common-stock</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>048 - Disclosure - Note 13 - Common Dividends, Dividend Equivalents and Distributions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions-details-textual</Role>
      <ShortName>Note 13 - Common Dividends, Dividend Equivalents and Distributions (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions-tables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>049 - Disclosure - Note 13 - Common Dividends, Dividend Equivalents and Distributions - Common Dividends, Dividend Equivalents and Distributions Declared (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-13-common-dividends-dividend-equivalents-and-distributions-common-dividends-dividend-equivalents-and-distributions-declared-details</Role>
      <ShortName>Note 13 - Common Dividends, Dividend Equivalents and Distributions - Common Dividends, Dividend Equivalents and Distributions Declared (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>050 - Disclosure - Note 15 - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-15-commitments-and-contingencies-details-textual</Role>
      <ShortName>Note 15 - Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-15-commitments-and-contingencies</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="nlcp20220331_10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>051 - Disclosure - Note 16 - Subsequent Events (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.newlake.com/20220331/role/statement-note-16-subsequent-events-details-textual</Role>
      <ShortName>Note 16 - Subsequent Events (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.newlake.com/20220331/role/statement-note-16-subsequent-events</ParentRole>
      <Position>52</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" original="nlcp20220331_10q.htm">nlcp20220331_10q.htm</File>
    <File>ex_371801.htm</File>
    <File>ex_371804.htm</File>
    <File>ex_371806.htm</File>
    <File>ex_371812.htm</File>
    <File>nlcp-20220331.xsd</File>
    <File>nlcp-20220331_cal.xml</File>
    <File>nlcp-20220331_def.xml</File>
    <File>nlcp-20220331_lab.xml</File>
    <File>nlcp-20220331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="486">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="28">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
