STOCK OPTIONS (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Stock-based compensation expense	$ 0	$ 8
2017 Employee Plan
Stock-based compensation expense	$ 6	$ 8
Vested stock options	98,000	49,000
Weighted-average exercise price, vested options	$ 4.44	$ 4.97
Weighted average contractual term	3 years 1 month 28 days	3 years 10 months 10 days
2007 Employee Plan
Stock-based compensation expense	$ 0	$ 0
Vested stock options	77,500	68,125
Weighted-average exercise price, vested options	$ 3.69	$ 3.62
Weighted average contractual term	11 months 16 days	1 year 10 months 10 days
Directors 2017 Equity Incentive Plan
Stock-based compensation expense	$ 0	$ 0
Vested stock options	240,000	160,000
Weighted-average exercise price, vested options	$ 3.93	$ 4.63
Weighted average contractual term	3 years 5 months 26 days	4 years
2007 Directors Equity Incentive Plan
Stock-based compensation expense	$ 0	$ 0
Vested stock options	237,500	300,000
Weighted-average exercise price, vested options	$ 3.36	$ 3.40
Weighted average contractual term	7 months 10 days	1 year 3 months 29 days

Amount of noncash expense for share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	TRT_EmployeeStockOwnershipPlanESPODisclosuresByPlanAxis=TRT_EmployeePlan2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	TRT_EmployeeStockOwnershipPlanESPODisclosuresByPlanAxis=TRT_EmployeePlan2007Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	TRT_EmployeeStockOwnershipPlanESPODisclosuresByPlanAxis=TRT_Directors2017EquityIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	TRT_EmployeeStockOwnershipPlanESPODisclosuresByPlanAxis=TRT_DirectorsEquityIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: