Note 18 - 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, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Income attributable to Trio-Tech International common shareholders from continuing operations, net of tax	$ 512	$ 856	$ 1,394	$ 1,770
Income / (loss) attributable to Trio-Tech International common shareholders from discontinued operations, net of tax	(5)	(1)	(5)	2
Net income attributable to Trio-Tech International Common Shareholders	$ 507	$ 855	$ 1,389	$ 1,772
Basic (in shares)	4,074	3,923	4,074	3,923
Dilutive effect of stock options (in shares)	88	319	86	206
Number of shares used to compute earnings per share diluted (in shares)	4,162	4,242	4,160	4,129
Basic earnings per share from continuing operations attributable to Trio-Tech International (in dollars per share)	$ 0.12	$ 0.22	$ 0.34	$ 0.46
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	0.22	0.34	0.46
Diluted earnings per share from continuing operations attributable to Trio-Tech International (in dollars per share)	0.12	0.20	0.33	0.43
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	$ 0.20	$ 0.33	$ 0.43