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Commitments and Contingencies (Details) $ in Thousands | Sep. 30, 2025 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Totaled arrangements under letter of credit guarantees and performance bonds securing performance obligations | $ 12,898
Guarantee obligations secured by cash deposits | 2,543
Guarantee obligations represented by a reduction of the available amount of the company's short term and long term revolving lines of credit | 932
Indian custom bonds outstanding | $ 4,087

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- Definition Represents the amount of guarantee obligations represented by a reduction of the available amount of the entity's revolving lines of credit. + References No definition available. + Details
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Namespace Prefix: | thr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the amount of guarantee obligations secured by cash deposits. + References No definition available. + Details
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Namespace Prefix: | thr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Indian Custom Bonds Outstanding + References No definition available. + Details
Name: | thr_IndianCustomBondsOutstanding
Namespace Prefix: | thr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant