Note 10 - Lines Of Credit- Line of Credit (Details) - USD ($)	6 Months Ended	12 Months Ended
Dec. 31, 2021	Jun. 30, 2021
Trio Tech International Pte Ltd [Member]
Basis spread rate	2.00%
Credit Limitation	$ 4,216	$ 4,806
Unused credit	$ 4,216	$ 4,806
Trio Tech International Pte Ltd [Member] \| SIBOR Rate [Member]
Basis spread rate	1.25%	1.25%
Trio Tech International Pte Ltd [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Basis spread rate	1.25%
Trio Tech International Pte Ltd [Member] \| Minimum [Member]
Interest rate	1.85%	1.85%
Trio Tech International Pte Ltd [Member] \| Maximum [Member]
Interest rate	5.50%	5.50%
Trio-Tech (Malaysia) Sdn. Bhd.[Member]
Credit Limitation	$ 359	$ 359
Unused credit	$ 359	187
Trio-Tech (Malaysia) Sdn. Bhd.[Member] \| Revolving Credit Facility [Member]
Credit Limitation		350
Unused credit		$ 350
Trio-Tech (Malaysia) Sdn. Bhd.[Member] \| London Interbank Offered Rate (LIBOR) [Member]
Basis spread rate		1.30%
Trio-Tech (Malaysia) Sdn. Bhd.[Member] \| Cost of Funds Rate [Member] \| Revolving Credit Facility [Member]
Basis spread rate		2.00%
Trio-Tech (Malaysia) Sdn. Bhd.[Member] \| Minimum [Member]
Interest rate		1.85%
Trio-Tech (Malaysia) Sdn. Bhd.[Member] \| Maximum [Member]
Interest rate		5.50%
Universal (Far East) Pte. Ltd. [Member]
Interest rate	1.85%
Credit Limitation	$ 1,109
Universal (Far East) Pte. Ltd. [Member] \| Minimum [Member]
Interest rate	5.50%
Universal (Far East) Pte. Ltd. [Member] \| Maximum [Member]
Interest rate	5.50%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=trt_TrioTechInternationalPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=trt_SIBORRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=trt_TriotechMalaysiaSdnBhdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=trt_CostOfFundsRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=trt_UniversalFarEastPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: