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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Income attributable to Trio-Tech International common shareholders from continuing operations, net of tax	$ 1,548	$ 1,197
Income / (loss) attributable to Trio-Tech International common shareholders from discontinued operations, net of tax	(3)	(13)
Net income attributable to Trio-Tech International common shareholders	$ 1,545	$ 1,184
Weighted average number of common shares outstanding - basic	3,673,000	3,553,000
Dilutive effect of stock options	89,000	218,000
Number of shares used to compute earnings per share - diluted	3,762,000	3,771,000
Basic Earnings per Share:
Basic earnings per share from continuing operations attributable to Trio-Tech International	$ 0.42	$ 0.34
Basic earnings per share from discontinued operations attributable to Trio-Tech International	.00	(0.01)
Basic Earnings per Share from Net Income Attributable to Trio-Tech International	0.42	0.33
Diluted Earnings per Share:
Diluted earnings per share from continuing operations attributable to Trio-Tech International	0.41	0.32
Diluted earnings per share from discontinued operations attributable to Trio-Tech International	.00	(0.01)
Diluted Earnings per Share from Net Income Attributable to Trio-Tech International	$ .41	$ 0.31

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-URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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