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ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Jun. 30, 2014
Notes to Financial Statements |  |
Beginning | $ 438 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 139 us-gaap_AllowanceForDoubtfulAccountsReceivable
Additions charged to expenses | 56 us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease | 303 us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Recovered | (6)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries | (2)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Currency translation effect | (30)TRT_CurrencyTranslationEffectOnAccountsReceivable | (2)TRT_CurrencyTranslationEffectOnAccountsReceivable
Ending | $ 458 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 438 us-gaap_AllowanceForDoubtfulAccountsReceivable

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- Definition Custom Element. + References No definition available. + Details
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Namespace Prefix: | TRT_
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Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | TRT_
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Balance Type: | na
Period Type: | duration

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of increase (decrease) in the allowance for doubtful accounts. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of recoveries of receivables doubtful of collection that were previously charged off. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration