Amount included in sum total to calculate borrowing base for advancing loans.

No definition available.

Name:	tpcs_AmountIncludedInSumToCalculateMaximumBorrowingBase
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the leverage ratio under the financial covenant in year one.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentCovenantLeverageRatioYearOne
Namespace Prefix:	tpcs_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the loan to value ratio under the financial covenant.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentCovenantLoanToValueRatio
Namespace Prefix:	tpcs_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the trailing period used for determination of loan to value ratio under the terms of the loan covenants.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentCovenantTrailingPeriodForMeasurementOfLoanToValueRatio
Namespace Prefix:	tpcs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum Debt Service Coverage Ratio (DSCR) required by a loan security agreement debt covenant.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentDebtServiceCoverageRatioThreshold
Namespace Prefix:	tpcs_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of accounts receivable used for determination of the aggregate amount of advances under the revolver loan.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentPercentageOfAccountsReceivableUsedForDeterminationOfAggregateAmountOfAdvances
Namespace Prefix:	tpcs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of Appraised value of equipment for determination of the aggregate amount of advances under the revolver loan.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentPercentageOfAppraisedValueOfEquipmentForDeterminationOfAggregateAmountOfAdvances
Namespace Prefix:	tpcs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of eligible raw material inventory used for determination of the aggregate amount of advances under the revolver loan.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentPercentageOfEligibleRawMaterialUsedForDeterminationOfAggregateAmountOfAdvances
Namespace Prefix:	tpcs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount of borrowing base required to grant loan advance.

+ References

No definition available.

+ Details

Name:	tpcs_MaximumAmountOfBorrowingBaseRequiredToGrantLoanAdvance
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
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-Name Accounting Standards Codification
-Topic 220
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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_RepaymentsOfLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=tpcs_BerkshireLoanMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=tpcs_RevolverLoanMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_NotesPayableOtherPayablesMember
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Balance Type:
Period Type:

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Name:	srt_RangeAxis=srt_MinimumMember
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DEBT - Berkshire Bank & Trust Company Loan Facility (Details)			3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Apr. 03, 2020 USD ($)	Dec. 23, 2019 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 21, 2016 USD ($)
Debt Instrument [Line Items]
Amount borrowed					$ 1,000,000	$ 0
Repayment of principal					1,000,000	$ 0
Ranor, Inc.
Debt Instrument [Line Items]
Term loan									$ 1,000,000
Berkshire Loan
Debt Instrument [Line Items]
Term loan									2,850,000
Berkshire Loan \| Revolver loan
Debt Instrument [Line Items]
Amount borrowed	$ 1,000,000
Repayment of principal				$ 1,000,000
Amount outstanding			$ 0		0		$ 0	$ 0
Interest payments					$ 5,986
Weighted average interest rate (as a percent)			2.76%		2.76%			2.76%
Unused borrowing capacity			$ 3,000,000		$ 3,000,000			$ 3,000,000
Berkshire Loan \| Restated Promissory Note
Debt Instrument [Line Items]
Maximum Amount Of Borrowing Base Required To Grant Loan Advance		$ 3,000,000
Debt Instrument Percentage Of Accounts Receivable Used For Determination Of Aggregate Amount Of Advances		80.00%
Debt Instrument Percentage Of Eligible Raw Material Used For Determination Of Aggregate Amount Of Advances		25.00%
Amount Included In Sum To Calculate Maximum Borrowing Base		$ 250,000
Debt Instrument Percentage Of Appraised Value Of Equipment For Determination Of Aggregate Amount Of Advances		50.00%
Debt Instrument, Description of Variable Rate Basis		one-month LIBOR plus 225 basis points
Berkshire Loan \| Ranor, Inc.
Debt Instrument [Line Items]
Debt Instrument Covenant Trailing Period For Measurement Of Loan To Value Ratio								365 days
Berkshire Loan \| Maximum
Debt Instrument [Line Items]
Debt Instrument Covenant Leverage Ratio Year One			2.50
Berkshire Loan \| Maximum \| Ranor, Inc.
Debt Instrument [Line Items]
Debt Instrument Covenant Loan To Value Ratio			0.75		0.75		0.75	0.75
Berkshire Loan \| Minimum
Debt Instrument [Line Items]
Debt Instrument Debt Service Coverage Ratio Threshold					1.2		1.2
Ranor and Berkshire \| Maximum
Debt Instrument [Line Items]
Revolving line of credit		$ 3,000,000							$ 1,000,000