12. LINES OF CREDIT (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015
TrioTech Intl Credit Facility [Member]
Credit limitation	$ 5,745	$ 7,422
Unused credit	$ 3,856	$ 6,161
TrioTech Intl Credit Facility [Member] \| MinimumMember
Type of facility	Lines of Credit	Lines of Credit
Interest rate	1.60%	1.90%
TrioTech Intl Credit Facility [Member] \| Maximum Member
Interest rate	5.50%	5.60%
TrioTech Malaysia Sdn Bhd Credit Facility [Member]
Credit limitation	$ 783	$ 396
Unused credit	$ 783	$ 79
TrioTech Malaysia Sdn Bhd Credit Facility [Member] \| MinimumMember
Type of facility	Lines of Credit	Lines of Credit
Interest rate	6.30%	6.30%
TrioTech Malaysia Sdn Bhd Credit Facility [Member] \| Maximum Member
Interest rate	6.70%	6.70%
TrioTech Tianjin Credit Facility [Member]
Credit limitation	$ 1,204	$ 1,289
Unused credit	$ 602	$ 1,289
TrioTech Tianjin Credit Facility [Member] \| MinimumMember
Type of facility	Lines of Credit	Lines of Credit
Interest rate	4.90%	4.90%
TrioTech Tianjin Credit Facility [Member] \| Maximum Member
Interest rate	6.30%	6.30%
TrioTech Tianjin Credit Facility [Member] \| Effective Rate [Member]
Interest rate	130.00%	130.00%

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://www.xbrl.org/2003/role/presentationRef
-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=6877327&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:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
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_RevolvingCreditFacility3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=TRT_EffectiveRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: