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LEASES - Supplemental cash flow information (Details) - USD ($)	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
LEASES
Cash used in operating activities	$ 66,023	$ 1,883
Cash used in financing activities	$ 475,440	$ 5,807

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- Definition

Payments From Financing Activities Relating To Leases.

+ References

No definition available.

+ Details

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

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- Definition

Payments From Operating Activities Relating To Lease

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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