Note 9 - Lines Of Credit- Line of Credit (Details) - USD ($)	9 Months Ended
Mar. 31, 2022	Jun. 30, 2021
Trio Tech International Pte Ltd [Member]
Trio-Tech International Pte. Ltd., Singapore	$ 3,900	$ 4,806,000
Basis spread rate	2.00%
Unused credit		4,806,000
Trio Tech International Pte Ltd [Member] \| SIBOR Rate [Member]
Trio-Tech International Pte. Ltd., Singapore	$ 1.25
Trio Tech International Pte Ltd [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Trio-Tech International Pte. Ltd., Singapore	$ 4,214
Trio Tech International Pte Ltd [Member] \| Minimum [Member]
Interest rate	1.85%
Trio Tech International Pte Ltd [Member] \| Maximum [Member]
Interest rate	5.50%
Universal (Far East) Pte. Ltd. [Member]
Interest rate	1.85%
Trio-Tech International Pte. Ltd., Singapore	$ 900	359,000
Unused credit		187,000
Universal (Far East) Pte. Ltd. [Member] \| Minimum [Member]
Interest rate	5.50%
Universal (Far East) Pte. Ltd. [Member] \| Maximum [Member]
Interest rate	5.50%
Trio-Tech (Malaysia) Sdn. Bhd.[Member]
Trio-Tech International Pte. Ltd., Singapore	$ 358	$ 350,000

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 https://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_UniversalFarEastPteLtdMember
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: