Document and Entity Information - shares	9 Months Ended
	Mar. 31, 2019	May 01, 2019
Document And Entity Information
Entity Registrant Name	TRIO-TECH INTERNATIONAL
Entity Central Index Key	0000732026
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
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 Common Stock, Shares Outstanding		3,673,055
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019