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v3.21.1

LEASES - Supplemental Cash Flow Information (Details) - USD ($) | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
LEASES |  |
Cash used in operating activities | $ 5,063 | $ 5,109
Cash used in financing activities | $ 22,460 | $ 10,951

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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