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Commitments and Contingencies - Additional Information (Details) - Simdax License Agreement [Member] $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Grant paid to canadian authority	$ 10.0
Grant paid to authority	$ 5.0
Lease Term Period	10 years
Non-refundable commercialization milestone payment	$ 45.0

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- References

No definition available.

+ Details

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Namespace Prefix:	tennx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	tennx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

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Namespace Prefix:	tennx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

+ Details

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

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- Details

Name:	us-gaap_PlanNameAxis=tennx_SimdaxLicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: