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Warrant Liabilities - Estimated fair value Private Warrants (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Warranty Liability Non Current	$ 21,974	$ 1,600
Private Placement Warrants [Member]
Warranty Liability Non Current	$ 21,974	$ 1,600

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- Definition

Warranty Liability Non Current

+ References

No definition available.

+ Details

Name:	th_WarrantyLiabilityNonCurrent
Namespace Prefix:	th_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=th_PrivatePlacementWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: