EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Notes to Financial Statements
Income attributable to Trio-Tech International common shareholders from continuing operations, net of tax	$ 682	$ (736)	$ 1,097	$ 520
Income / (loss) attributable to Trio-Tech International common shareholders from discontinued operations, net of tax	1	(3)	(1)	(11)
Net income attributable to Trio-Tech International common shareholders	$ 683	$ (739)	$ 1,096	$ 509
Weighted average number of common shares outstanding - basic	3,673	3,553	3,673	3,553
Dilutive effect of stock options	12	219	73	225
Number of shares used to compute earnings per share - diluted	3,685	3,772	3,746	3,778
Basic earnings per share from continuing operations attributable to Trio-Tech International	$ 0.19	$ (0.21)	$ 0.3	$ 0.15
Basic earnings per share from discontinued operations attributable to Trio-Tech International	0.00	0.00	0.00	0.00
Basic Earnings per Share from Net Income Attributable to Trio-Tech International	0.19	(0.21)	0.3	0.15
Diluted earnings per share from continuing operations attributable to Trio-Tech International	0.19	(0.20)	0.29	0.14
Diluted earnings per share from discontinued operations attributable to Trio-Tech International	0.00	0.00	0.00	0.00
Diluted Earnings per Share from Net Income Attributable to Trio-Tech International	$ 0.19	$ (0.20)	$ 0.29	$ 0.14