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Note 12 - Bank Loans Payable - Bank Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Bank loan payable	$ 1,927	$ 2,060
Current portion of bank loans payable	444	428
Currency translation effect on current portion of bank loans	(6)	11
Current portion of bank loans payable	438	439
Long-term portion of bank loans payable	1,510	1,564
Currency translation effect on long-term portion of bank loans	(21)	57
Long-term portion of bank loans payable	1,489	1,621
Notes Payable To Banks 1 [Member]
Bank loan payable	1,764	1,885
Notes Payable To Banks 2 [Member]
Bank loan payable	$ 163	$ 175

X

- Definition

Represents long-term bank loan for currency translation effect.

+ References

No definition available.

+ Details

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Namespace Prefix:	trt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents effect on short-term portion of bank loan for currency translation.

+ References

No definition available.

+ Details

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Namespace Prefix:	trt_
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X

- Definition

Represents current gross loan payable to bank.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Represents gross long-term loan loans from bank.

+ References

No definition available.

+ Details

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Namespace Prefix:	trt_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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X

- Definition

Carrying value as of the balance sheet date of current portion of long-term loans payable to bank due within one year or the operating cycle if longer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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X

- Definition

Carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the operating cycle if longer, excluding current portion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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