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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income Attributable to Trio-Tech International Common Shareholders	$ 1,545	$ 1,184
Earnings retained in subsidiaries	14,019	12,393
Research and development costs	345	451
Trio-Tech International [Member]
Restricted term deposits	1,478	1,468
55% owned Malaysian subsidiary
Short-term deposits	1,426	548
Restricted term deposits	228	227
Trio-Tech Thailand
Short-term deposits	$ 113	$ 105

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