EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Notes to Financial Statements
Income attributable to Trio-Tech International common shareholders from continuing operations, net of tax	$ 346	$ 678	$ 415	$ 1,254
Loss attributable to Trio-Tech International common shareholders from discontinued operations, net of tax	2	(5)	(2)	(6)
Net income attributable to Trio-Tech International common shareholders	$ 348	$ 673	$ 413	$ 1,248
Weighted average number of common shares outstanding - basic	3,673	3,548	3,673	3,548
Dilutive effect of stock options	108	245	142	222
Number of shares used to compute earnings per share - diluted	3,781	3,793	3,815	3,770
Basic earnings per share from continuing operations attributable to Trio-Tech International	$ 0.09	$ 0.19	$ 0.11	$ 0.35
Basic earnings per share from discontinued operations attributable to Trio-Tech International	.00	.00	.00	.00
Basic Earnings per Share from Net Income Attributable to Trio-Tech International	0.09	0.19	0.11	0.35
Diluted earnings per share from continuing operations attributable to Trio-Tech International	0.09	0.18	0.11	0.34
Diluted earnings per share from discontinued operations attributable to Trio-Tech International	.00	.00	.00	.00
Diluted Earnings per Share from Net Income Attributable to Trio-Tech International	$ 0.09	$ 0.18	$ 0.11	$ 0.34