<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>88</ContextCount>
  <ElementCount>312</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>33</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000002 - Statement - Consolidated Balance Sheet</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Consolidated Balance Sheet</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000003 - Statement - Consolidated Balance Sheet (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/ConsolidatedBalanceSheetParenthetical</Role>
      <ShortName>Consolidated Balance Sheet (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000004 - Statement - Consolidated Statement of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/ConsolidatedStatementOfOperations</Role>
      <ShortName>Consolidated Statement of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000005 - Statement - Consolidated Changes in Stockholders Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/ConsolidatedChangesInStockholdersEquity</Role>
      <ShortName>Consolidated Changes in Stockholders Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000006 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000007 - Disclosure - Nature of Business and Presentation of Financial Statements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/NatureOfBusinessAndPresentationOfFinancialStatements</Role>
      <ShortName>Nature of Business and Presentation of Financial Statements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000008 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000009 - Disclosure - Liquidity, Capital Resources</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/LiquidityCapitalResources</Role>
      <ShortName>Liquidity, Capital Resources</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000010 - Disclosure - Inventory</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/Inventory</Role>
      <ShortName>Inventory</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000011 - Disclosure - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IntangibleAssets</Role>
      <ShortName>Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000012 - Disclosure - Revenue, Unearned Revenue and Unbilled Accounts Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RevenueUnearnedRevenueAndUnbilledAccountsReceivable</Role>
      <ShortName>Revenue, Unearned Revenue and Unbilled Accounts Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000013 - Disclosure - Stockholder' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquity</Role>
      <ShortName>Stockholder' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000014 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000015 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000016 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>000017 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>000018 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000020 - Disclosure - Inventory (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/InventoryTables</Role>
      <ShortName>Inventory (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://scwo.com/role/Inventory</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>000021 - Disclosure - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IntangibleAssetsTables</Role>
      <ShortName>Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://scwo.com/role/IntangibleAssets</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>000022 - Disclosure - Revenue (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RevenueTables</Role>
      <ShortName>Revenue (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://scwo.com/role/RevenueUnearnedRevenueAndUnbilledAccountsReceivable</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>000023 - Disclosure - Stockholder Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquityTables</Role>
      <ShortName>Stockholder Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>000024 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://scwo.com/role/IncomeTaxes</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000025 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000026 - Disclosure - Summary of Significant Accounting Policies (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesDetails1</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>000027 - Disclosure - Summary of Significant Accounting Policies (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesDetails2</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>000028 - Disclosure - Summary of Significant Accounting Policies (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesDetails3</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>000029 - Disclosure - Summary of Significant Accounting Policies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>Summary of Significant Accounting Policies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>000030 - Disclosure - Liquidity, Capital Resources (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/LiquidityCapitalResourcesDetailsNarrative</Role>
      <ShortName>Liquidity, Capital Resources (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/LiquidityCapitalResources</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>000031 - Disclosure - Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/InventoryDetails</Role>
      <ShortName>Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/InventoryTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>000032 - Disclosure - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IntangibleAssetsDetails</Role>
      <ShortName>Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IntangibleAssetsTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>000033 - Disclosure - Intangible Assets (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IntangibleAssetsDetails1</Role>
      <ShortName>Intangible Assets (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IntangibleAssetsTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>000034 - Disclosure - Intangible Assets (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IntangibleAssetsDetailsNarrative</Role>
      <ShortName>Intangible Assets (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IntangibleAssetsTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>000035 - Disclosure - Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RevenueDetails</Role>
      <ShortName>Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/RevenueTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>000036 - Disclosure - Revenue (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RevenueDetails1</Role>
      <ShortName>Revenue (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/RevenueTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>000037 - Disclosure - Revenue (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RevenueDetails2</Role>
      <ShortName>Revenue (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/RevenueTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>000038 - Disclosure - Stockholder Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquityDetails</Role>
      <ShortName>Stockholder Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/StockholderEquityTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>000039 - Disclosure - Stockholder Equity (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquityDetails1</Role>
      <ShortName>Stockholder Equity (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/StockholderEquityTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>000040 - Disclosure - Stockholder Equity (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquityDetails2</Role>
      <ShortName>Stockholder Equity (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/StockholderEquityTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>000041 - Disclosure - Stockholder Equity (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/StockholderEquityDetailsNarrative</Role>
      <ShortName>Stockholder Equity (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/StockholderEquityTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>000042 - Disclosure - Related Party Transactions (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/RelatedPartyTransactionsDetailsNarrative</Role>
      <ShortName>Related Party Transactions (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/RelatedPartyTransactions</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>000043 - Disclosure - Commitments and Contingencies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/CommitmentsAndContingenciesDetailsNarrative</Role>
      <ShortName>Commitments and Contingencies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>000044 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IncomeTaxesTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>000045 - Disclosure - Income Taxes (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IncomeTaxesDetails1</Role>
      <ShortName>Income Taxes (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IncomeTaxesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="scwo_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>000046 - Disclosure - Income Taxes (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://scwo.com/role/IncomeTaxesDetailsNarrative</Role>
      <ShortName>Income Taxes (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://scwo.com/role/IncomeTaxesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 22 fact(s) appearing in ix:hidden were eligible for transformation: dei:CurrentFiscalYearEndDate, dei:DocumentAnnualReport, dei:DocumentFinStmtErrorCorrectionFlag, dei:DocumentTransitionReport, dei:SecurityExchangeName, dei:TradingSymbol, scwo:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2EndingBalance, scwo:WeightedAverageExercisePriceExercisableAtDecember312023, scwo:WeightedAverageRemainingContractualLifeYearsEndingBalance, us-gaap:CommonStockParOrStatedValuePerShare, us-gaap:CommonStockSharesAuthorized, us-gaap:CommonStockSharesIssued, us-gaap:CommonStockSharesOutstanding, us-gaap:OtherExpenses, us-gaap:PreferredStockParOrStatedValuePerShare, us-gaap:PreferredStockSharesAuthorized, us-gaap:PreferredStockSharesIssued, us-gaap:PreferredStockSharesOutstanding, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue -  scwo_10k.htm 1</Log>
    <Log type="Warning">[dqc-0004-Element-Values-Are-Equal] CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect with a value of 6398467 is not equal to the total of NetCashProvidedByUsedInOperatingActivities, NetCashProvidedByUsedInInvestingActivities, NetCashProvidedByUsedInFinancingActivities with a value of -9034987 + 1851717 + 13578938. These values should be equal. The properties of this CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect fact are Context: From2023-01-01to2023-12-31, Unit: USD, Rule Element Id: 9286. scwo_10k.htm 1</Log>
    <Log type="Warning">[dqc-0004-Element-Values-Are-Equal] CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect with a value of -7084238 is not equal to the total of NetCashProvidedByUsedInOperatingActivities, NetCashProvidedByUsedInInvestingActivities, NetCashProvidedByUsedInFinancingActivities with a value of -4948668 + -2160291 + 25049. These values should be equal. The properties of this CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect fact are Context: From2022-01-01to2022-12-31, Unit: USD, Rule Element Id: 9286. scwo_10k.htm 1</Log>
    <Log type="Warning">[DQC.US.0043.9873] The company has reported the concept ProfitLoss as part of the cash flow statement. This income item is being deducted from the value of operating cash flows in the calculation defined by the filer.  This implies that the resulting operating cash flow calculation excludes this income item from cash flow from operations.  If  ProfitLoss represents income from discontinued operations then the element NetCashProvidedByUsedInOperatingActivitiesContinuingOperations should be used as the total rather than the current total element of NetCashProvidedByUsedInOperatingActivities. If the item is an income item and is being deducted because the value is negative then consider changing the sign and weight of the element. - https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd 4602, 9356 - https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd 4602, 9356</Log>
  </Logs>
  <InputFiles>
    <File>scwo-20231231.xsd</File>
    <File>scwo-20231231_cal.xml</File>
    <File>scwo-20231231_def.xml</File>
    <File>scwo-20231231_lab.xml</File>
    <File>scwo-20231231_pre.xml</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="scwo_10k.htm">scwo_10k.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="526">http://fasb.org/us-gaap/2023</BaseTaxonomy>
    <BaseTaxonomy items="39">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
