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LEASES - Maturities of lease liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Maturities of lease liabilities |  |
October 1, 2025 - September 30, 2026 | $ 944 |
October 1, 2026 - September 30, 2027 | 939 |
October 1, 2027 - September 30, 2028 | 939 |
October 1, 2028 - September 30, 2029 | 939 |
October 1, 2029 - September 30, 2030 | 625 |
Total lease payments | 4,386 |
Less: imputed interest | 358 |
Total lease liability | $ 4,028 | $ 4,408

X
- Definition Amount of lease liabilities during the period. + References No definition available. + Details
Name: | tpcs_LeaseLiability
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's interest amount for lease payments in excess of discounted obligation for lease payments for operating and finance lease. + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityImputedInterest
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease. + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsDue
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsDueNextTwelveMonths
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsToBePaidYearFive
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsToBePaidYearFour
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsToBePaidYearThree
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating and finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | tpcs_LesseeLeaseLiabilityPaymentsToBePaidYearTwo
Namespace Prefix: | tpcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | tpcs_LesseeOperatingAndFinanceLeaseLiabilityToBePaidFiscalYearMaturityAbstract
Namespace Prefix: | tpcs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration