LINES OF CREDIT (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Dec. 31, 2020	Jun. 30, 2020
TrioTech Intl Credit Facility
Type of facility	Lines of Credit	Lines of Credit
Credit limitation	$ 5,438	$ 4,806
Unused credit	$ 5,438	$ 4,806
TrioTech Intl Credit Facility \| Minimum
Interest rate	1.85%	1.85%
TrioTech Intl Credit Facility \| Maximum
Interest rate	5.50%	5.50%
TrioTech Intl Credit Facility
Type of facility	Lines of Credit
Credit limitation	$ 378
Unused credit	$ 378
TrioTech Intl Credit Facility \| Minimum
Interest rate	1.85%
TrioTech Intl Credit Facility \| Maximum
Interest rate	5.50%
TrioTech Malaysia Sdn Bhd Credit Facility
Type of facility	Revolving Credit	Revolving Credit
Interest rate	2.00%	2.00%
Credit limitation	$ 371	$ 350
Unused credit	$ 371	$ 350
Universal (Far East) Pte. Ltd.
Type of facility		Lines of Credit
Credit limitation		$ 359
Unused credit		$ 187
Universal (Far East) Pte. Ltd. \| Minimum
Interest rate		1.85%
Universal (Far East) Pte. Ltd. \| Maximum
Interest rate		5.50%

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.

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

Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num: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_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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_CreditFacilityAxis=TRT_RevolvingCreditFacilityOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=TRT_RevolvingCreditFacility2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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