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FAIR VALUE MEASUREMENTS (Details) (USD $) | Mar. 31, 2013
--- | ---
Short-term deposits | $ 110,000
Restricted term deposits | 3,554,000
Total assets measured at fair value | 32,456,000
Percentage of total assets | 11.30%
Fair Value Inputs Level 1 [Member] |
Short-term deposits | 110,000
Restricted term deposits | 3,554,000
Total assets measured at fair value | 32,456,000
Percentage of total assets | 11.30%
Fair Value Inputs Level 2 [Member] |
Short-term deposits |
Restricted term deposits |
Total assets measured at fair value |
Percentage of total assets |
Fair Value Inputs Level 3 [Member] |
Short-term deposits |
Restricted term deposits |
Total assets measured at fair value |
Percentage of total assets |

X
- Definition Custom Element. + References No definition available. + Details
Name: | TRT_DepositsAssetsNoncurrent1
Namespace Prefix: | TRT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Custom Element. + References No definition available. + Details
Name: | TRT_PercentageOfTotalAssets
Namespace Prefix: | TRT_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Custom Element. + References No definition available. + Details
Name: | TRT_ShorttermDeposits1
Namespace Prefix: | TRT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Custom Element. + References No definition available. + Details
Name: | TRT_TotalAssetsMeasuredAtFairValue
Namespace Prefix: | TRT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant