Note 10 - Lines Of Credit- Line of Credit (Details) (Parentheticals)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Trio Tech International Pte Ltd [Member] | SIBOR Rate [Member]
Basis spread rate		1.20%
Trio Tech International Pte Ltd [Member] | London Interbank Offered Rate (LIBOR) [Member]
Basis spread rate		1.25%
Trio Tech International Pte Ltd [Member] | Minimum [Member]
Fixed Interest Rate	1.85%	1.85%
Trio Tech International Pte Ltd [Member] | Maximum [Member]
Fixed Interest Rate	5.50%	5.50%
Universal (Far East) Pte. Ltd. [Member] | Minimum [Member]
Fixed Interest Rate	1.85%	1.85%
Universal (Far East) Pte. Ltd. [Member] | Maximum [Member]
Fixed Interest Rate	5.50%	5.50%
Trio-Tech (Malaysia) Sdn. Bhd.[Member] | Cost of Funds Rate [Member]
Basis spread rate	2.00%	2.00%