Note 1 - Basis of Presentation and Summary of Significant Accounting Policies - Ownership (Details) |
Jun. 30, 2026 |
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|---|---|---|---|---|---|---|---|---|
| Express Test Corporation Dormant [Member] | ||||||||
| Ownership | 100.00% | |||||||
| Trio Tech Reliability Services Dormant [Member] | ||||||||
| Ownership | 100.00% | |||||||
| KTS Incorporated, dba Universal Systems (Dormant) [Member] | ||||||||
| Ownership | 100.00% | |||||||
| Trio Tech International Pte Ltd [Member] | ||||||||
| Ownership | 100.00% | |||||||
| Universal (Far East) Pte. Ltd. [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| Trio-Tech International (Thailand) Co. Ltd. [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| Trio-Tech (Bangkok) Co. Ltd [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| Trio-Tech (Malaysia) Sdn. Bhd [Member] | ||||||||
| Ownership | 100.00% | [1],[2] | ||||||
| Prestal Enterprise Sdn. Bhd. [Member] | ||||||||
| Ownership | 76.00% | [1] | ||||||
| Trio-Tech (SIP) Co., Ltd [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| Trio-Tech (Chongqing) Co. Ltd [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| SHI International Pte. Ltd. (Dormant) [Member] | ||||||||
| Ownership | 55.00% | [3] | ||||||
| Trio-Tech (Tianjin) Co., Ltd, [Member] | ||||||||
| Ownership | 100.00% | [1] | ||||||
| Trio-tech (Jiangsu) Co. Ltd. [Member] | ||||||||
| Ownership | 100.00% | |||||||
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