Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2020	Nov. 01, 2020
Document And Entity Information
Entity Registrant Name	TRIO-TECH INTERNATIONAL
Entity Central Index Key	0000732026
Document Type	10-Q
Document Period End Date	Sep. 30, 2020
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	CA
Entity File Number	1-14523
Entity Common Stock, Shares Outstanding		3,710,555
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021