Document and Entity Information - shares	6 Months Ended
	Dec. 31, 2017	Feb. 01, 2018
Document And Entity Information
Entity Registrant Name	TRIO-TECH INTERNATIONAL
Entity Central Index Key	0000732026
Document Type	10-Q
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		3,553,055
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2018