Note 12 - Defined Contribution Retirement Plans (Details Textual) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0.4 | $ 0.2 |
| LightPath Plan [Member] | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employee's First Two Percent Matched | 100.00% | |
| G5 Plan [Member] | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employee's First Four Percent Matched | 100.00% | |