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

Amount of maximum capital expenditure to be incurred under the terms loan agreement covenant in year four and thereafter.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentCovenantMaximumCapitalExpendituresToBeIncurredYearFourAndThereafter
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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 amount of indebtedness where it exceeds the amount specified in the agreement, which results to event of default.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentEventOfDefaultExcessOfIndebtedness
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents amount of entry judgment where it exceeds the amount specified in the agreement, which results to event of default.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentEventOfDefaultInExcessOfEntryOfJudgment
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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 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

Period of debt prepayment preceding to maturity Date, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	tpcs_DebtInstrumentPrepaymentPeriod
Namespace Prefix:	tpcs_
Data Type:	xbrli:durationItemType
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

It represents the percentage rate of nonrefundable commitment fee.

+ References

No definition available.

+ Details

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

- Definition

The amount of payment of loan related to execution of modification.

+ References

No definition available.

+ Details

Name:	tpcs_PaymentOfLoanRelatedToExecutionOfModification
Namespace Prefix:	tpcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

Name:	us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=tpcs_RanorIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT - Berkshire Bank & Trust Company Loan Facility (Details)	1 Months Ended		6 Months Ended	12 Months Ended
	Dec. 19, 2018 USD ($)	Dec. 21, 2016 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000		$ 1,000,000		$ 1,000,000
Nonrefundable Commitment Fee, Percentage			0.25%
payment related to execution of modification	$ 7,245
Berkshire Loan
Debt Instrument [Line Items]
Debt Instrument Debt Service Coverage Ratio Threshold					1.2
Debt Instrument Covenant Leverage Ratio Year One					2.50
Debt Instrument Covenant Maximum Capital Expenditures To Be Incurred Year Four And Thereafter				$ 1,500,000
Debt Instrument Covenant Loan To Value Ratio					0.75
Debt Instrument Covenant Trailing Period For Measurement Of Loan To Value Ratio					365 days
Unamortized Debt Issuance Expense			$ 26,688		$ 32,982
Berkshire Loan \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum Amount Of Borrowing Base Required To Grant Loan Advance		$ 1,000,000
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, Description of Variable Rate Basis			one-month LIBOR plus 275 basis points
Berkshire Loan \| Secured Term Loan
Debt Instrument [Line Items]
Debt Instrument, Term		60 months
Debt Instrument, Periodic Payment		$ 19,260
Debt Instrument Prepayment Period		45 days
Debt Instrument, Interest Rate, Stated Percentage		5.21%
Berkshire Loan \| Ranor, Inc.
Debt Instrument [Line Items]
Debt Instrument Event Of Default Excess Of Indebtedness		$ 100,000
Debt Instrument Event Of Default In Excess Of Entry Of Judgment		150,000
Berkshire Loan \| Ranor, Inc. \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Face Amount		2,850,000
Berkshire Loan \| Ranor, Inc. \| Secured Term Loan
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,000,000