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Personnel expenses - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2023 | Nov. 30, 2022
Disclosure Of Personnel Expenses Explanatory [Abstract] |  |
Amount of charges related to severance and other expenses | $ 1,963 | $ 457

X
- Definition Amount of charges related to severance and other expenses. + References No definition available. + Details
Name: | thtx_AmountOfChargesRelatedToSeveranceAndOtherExpenses
Namespace Prefix: | thtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Disclosure of personnel expenses + References No definition available. + Details
Name: | thtx_DisclosureOfPersonnelExpensesExplanatoryAbstract
Namespace Prefix: | thtx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration