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Note 3 - Term Deposits - Term Deposits (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Jun. 30, 2021
--- | --- | ---
Short-term deposits | $ 4,961 | $ 6,353
Currency translation effect on short-term deposits | 8 | (298)
Total short-term deposits | 4,953 | 6,651
Restricted term deposits | 1,736 | 1,682
Currency translation effect on restricted term deposits | (1) | 59
Total restricted term deposits | 1,735 | 1,741
Total term deposits | $ 6,688 | $ 8,392

X
- Definition Represents effect restricted term deposits for currency translation. + References No definition available. + Details
Name: | trt_CurrencyTranslationEffectRestrictedTermDeposits
Namespace Prefix: | trt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents currency translation effect short term deposit. + References No definition available. + Details
Name: | trt_CurrencyTranslationEffectShortTermDeposit
Namespace Prefix: | trt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents restricted deposits assets. + References No definition available. + Details
Name: | trt_DepositsAssetsRestricted
Namespace Prefix: | trt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents restricted total deposits asset. + References No definition available. + Details
Name: | trt_DepositsAssetsRestrictedTotal
Namespace Prefix: | trt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents short-term depoist. + References No definition available. + Details
Name: | trt_ShortTermDeposit
Namespace Prefix: | trt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DepositAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DepositsAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant