EMPLOYEE BENEFIT PLANS (Narrative) (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] | ||
| Company contributions | $ 83,750 | $ 79,240 |
| Matching contributions, percent | 25.00% | 25.00% |
| Koss Employee Stock Ownership Trust [Member] | ||
| Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] | ||
| Contributions | $ 0 | $ 0 |