Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Sep. 01, 2021	Dec. 31, 2020
Document And Entity Information
Entity Registrant Name	TRIO-TECH INTERNATIONAL
Entity Central Index Key	0000732026
Document Type	10-K
Document Period End Date	Jun. 30, 2021
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	CA
Entity File Number	1-14523
Entity Public Float			$ 6,644,000
Entity Common Stock, Shares Outstanding		3,913,055
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021