Note 19 - Earnings Per Share - Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income attributable to Trio-Tech International common shareholders from continuing operations, net of tax	$ 503	$ 512	$ 730	$ 1,394
Income / (loss) attributable to Trio-Tech International common shareholders from discontinued operations, net of tax	4	(5)	7	(5)
Net income attributable to Trio-Tech International Common Shareholders	$ 507	$ 507	$ 737	$ 1,389
Weighted average number of common shares outstanding - basic (in shares)	4,120	4,074	4,109	4,074
Dilutive effect of stock options (in shares)	139	88	161	86
Number of shares used to compute earnings per share - diluted (in shares)	4,259	4,162	4,270	4,160
Basic earnings per share from continuing operations attributable to Trio-Tech International (in dollars per share)	$ 0.12	$ 0.12	$ 0.18	$ 0.34
Basic earnings per share from discontinued operations attributable to Trio-Tech International (in dollars per share)	0	0	0	0
Basic earnings per share from net income attributable to Trio-Tech International (in dollars per share)	0.12	0.12	0.18	0.34
Diluted earnings per share from continuing operations attributable to Trio-Tech International (in dollars per share)	0.12	0.12	0.17	0.33
Diluted earnings per share from discontinued operations attributable to Trio-Tech International (in dollars per share)	0	0	0	0
Diluted earnings per share from net income attributable to Trio-Tech International (in dollars per share)	$ 0.12	$ 0.12	$ 0.17	$ 0.33