<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.10.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>115</ContextCount>
  <ElementCount>228</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>41</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncome</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CondensedConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1007 - Disclosure - DESCRIPTION OF BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DescriptionOfBusiness</Role>
      <ShortName>DESCRIPTION OF BUSINESS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1008 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/BasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1009 - Disclosure - ACCOUNTING STANDARDS UPDATES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccountingStandardsUpdates</Role>
      <ShortName>ACCOUNTING STANDARDS UPDATES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1010 - Disclosure - REVENUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/Revenue</Role>
      <ShortName>REVENUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>1011 - Disclosure - CONTRACT ASSETS and CONTRACT LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ContractAssetsAndContractLiabilities</Role>
      <ShortName>CONTRACT ASSETS and CONTRACT LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>1012 - Disclosure - INVENTORIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/Inventories</Role>
      <ShortName>INVENTORIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>1013 - Disclosure - OTHER CURRENT ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherCurrentAssets</Role>
      <ShortName>OTHER CURRENT ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>1014 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/PropertyPlantAndEquipmentNet</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>1015 - Disclosure - OTHER NONCURRENT ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherNoncurrentAssets</Role>
      <ShortName>OTHER NONCURRENT ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>1016 - Disclosure - ACCRUED EXPENSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccruedExpenses</Role>
      <ShortName>ACCRUED EXPENSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>1017 - Disclosure - DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/Debt</Role>
      <ShortName>DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>1018 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/IncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>1019 - Disclosure - PROFIT SHARING PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ProfitSharingPlan</Role>
      <ShortName>PROFIT SHARING PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>1020 - Disclosure - STOCK BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensation</Role>
      <ShortName>STOCK BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>1021 - Disclosure - CONCENTRATION OF CREDIT RISK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ConcentrationOfCreditRisk</Role>
      <ShortName>CONCENTRATION OF CREDIT RISK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>1022 - Disclosure - COMMITMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/Commitments</Role>
      <ShortName>COMMITMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>1023 - Disclosure - EARNINGS PER SHARE (EPS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/EarningsPerShareEps</Role>
      <ShortName>EARNINGS PER SHARE (EPS)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>1024 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/BasisOfPresentationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>1025 - Disclosure - ACCOUNTING STANDARDS UPDATES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccountingStandardsUpdatesTables</Role>
      <ShortName>ACCOUNTING STANDARDS UPDATES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/AccountingStandardsUpdates</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>1026 - Disclosure - REVENUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/RevenueTables</Role>
      <ShortName>REVENUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/Revenue</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>1027 - Disclosure - INVENTORIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/InventoriesTables</Role>
      <ShortName>INVENTORIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/Inventories</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>1028 - Disclosure - OTHER CURRENT ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherCurrentAssetsTables</Role>
      <ShortName>OTHER CURRENT ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/OtherCurrentAssets</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>1029 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/PropertyPlantAndEquipmentNetTables</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/PropertyPlantAndEquipmentNet</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>1030 - Disclosure - OTHER NONCURRENT ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherNoncurrentAssetsTables</Role>
      <ShortName>OTHER NONCURRENT ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/OtherNoncurrentAssets</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>1031 - Disclosure - ACCRUED EXPENSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccruedExpensesTables</Role>
      <ShortName>ACCRUED EXPENSES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/AccruedExpenses</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>1032 - Disclosure - DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DebtTables</Role>
      <ShortName>DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/Debt</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>1033 - Disclosure - STOCK BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensationTables</Role>
      <ShortName>STOCK BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/StockBasedCompensation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>1034 - Disclosure - CONCENTRATION OF CREDIT RISK (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ConcentrationOfCreditRiskTables</Role>
      <ShortName>CONCENTRATION OF CREDIT RISK (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/ConcentrationOfCreditRisk</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>1035 - Disclosure - EARNINGS PER SHARE (EPS) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/EarningsPerShareEpsTables</Role>
      <ShortName>EARNINGS PER SHARE (EPS) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/EarningsPerShareEps</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>1036 - Disclosure - ACCOUNTING STANDARDS UPDATES -opening and closing balances for inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccountingStandardsUpdatesOpeningAndClosingBalancesForInventoriesDetails</Role>
      <ShortName>ACCOUNTING STANDARDS UPDATES -opening and closing balances for inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>1037 - Disclosure - ACCOUNTING STANDARDS UPDATES-summarize the impact of the adoption of ASC 606 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccountingStandardsUpdatesSummarizeTheImpactOfTheAdoptionOfAsc606Details</Role>
      <ShortName>ACCOUNTING STANDARDS UPDATES-summarize the impact of the adoption of ASC 606 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>1038 - Disclosure - ACCOUNTING STANDARDS UPDATES - Summary (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccountingStandardsUpdatesSummaryDetails</Role>
      <ShortName>ACCOUNTING STANDARDS UPDATES - Summary (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>1039 - Disclosure - REVENUE - disaggregated basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/RevenueDisaggregatedBasisDetails</Role>
      <ShortName>REVENUE - disaggregated basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>1040 - Disclosure - REVENUE -  net sales from customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/RevenueNetSalesFromCustomersDetails</Role>
      <ShortName>REVENUE -  net sales from customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>1041 - Disclosure - REVENUE - additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/RevenueAdditionalInformationDetails</Role>
      <ShortName>REVENUE - additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>1042 - Disclosure - CONTRACT ASSETS and CONTRACT LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ContractAssetsAndContractLiabilitiesDetails</Role>
      <ShortName>CONTRACT ASSETS and CONTRACT LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/ContractAssetsAndContractLiabilities</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>1043 - Disclosure - INVENTORIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/InventoriesDetails</Role>
      <ShortName>INVENTORIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/InventoriesTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>1044 - Disclosure - OTHER CURRENT ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherCurrentAssetsDetails</Role>
      <ShortName>OTHER CURRENT ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/OtherCurrentAssetsTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>1045 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/PropertyPlantAndEquipmentNetDetails</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/PropertyPlantAndEquipmentNetTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>1046 - Disclosure - OTHER NONCURRENT ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/OtherNoncurrentAssetsDetails</Role>
      <ShortName>OTHER NONCURRENT ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/OtherNoncurrentAssetsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>1047 - Disclosure - ACCRUED EXPENSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/AccruedExpensesDetails</Role>
      <ShortName>ACCRUED EXPENSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/AccruedExpensesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>1048 - Disclosure - DEBT - Long-term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DebtLongTermDebtDetails</Role>
      <ShortName>DEBT - Long-term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>1049 - Disclosure - DEBT - Berkshire Bank &amp; Trust Company Loan Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DebtBerkshireBankTrustCompanyLoanFacilityDetails</Role>
      <ShortName>DEBT - Berkshire Bank &amp; Trust Company Loan Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>1050 - Disclosure - DEBT - People's Capital and Leasing Corp. Equipment Loan Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DebtPeoplesCapitalAndLeasingCorpEquipmentLoanFacilityDetails</Role>
      <ShortName>DEBT - People's Capital and Leasing Corp. Equipment Loan Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>1051 - Disclosure - DEBT - Capital Lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/DebtCapitalLeaseDetails</Role>
      <ShortName>DEBT - Capital Lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>1052 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/IncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/IncomeTaxes</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>1053 - Disclosure - PROFIT SHARING PLAN (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ProfitSharingPlanDetails</Role>
      <ShortName>PROFIT SHARING PLAN (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/ProfitSharingPlan</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>1054 - Disclosure - STOCK BASED COMPENSATION - Summary (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensationSummaryDetails</Role>
      <ShortName>STOCK BASED COMPENSATION - Summary (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>1055 - Disclosure - STOCK BASED COMPENSATION - Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensationStockOptionActivityDetails</Role>
      <ShortName>STOCK BASED COMPENSATION - Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>1056 - Disclosure - STOCK BASED COMPENSATION - Stock Options Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensationStockOptionsOutstandingDetails</Role>
      <ShortName>STOCK BASED COMPENSATION - Stock Options Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>1057 - Disclosure - STOCK BASED COMPENSATION - Stock Options Outstanding By Exercise Price (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/StockBasedCompensationStockOptionsOutstandingByExercisePriceDetails</Role>
      <ShortName>STOCK BASED COMPENSATION - Stock Options Outstanding By Exercise Price (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>1058 - Disclosure - CONCENTRATION OF CREDIT RISK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/ConcentrationOfCreditRiskDetails</Role>
      <ShortName>CONCENTRATION OF CREDIT RISK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/ConcentrationOfCreditRiskTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>1059 - Disclosure - COMMITMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/CommitmentsDetails</Role>
      <ShortName>COMMITMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/Commitments</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="tpcs-20180630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>1060 - Disclosure - EARNINGS PER SHARE (EPS) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tech.pre.com/role/EarningsPerShareEpsDetails</Role>
      <ShortName>EARNINGS PER SHARE (EPS) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.tech.pre.com/role/EarningsPerShareEpsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>tpcs-20180630.xml</File>
    <File>tpcs-20180630.xsd</File>
    <File>tpcs-20180630_cal.xml</File>
    <File>tpcs-20180630_def.xml</File>
    <File>tpcs-20180630_lab.xml</File>
    <File>tpcs-20180630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2018-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2018-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
