Note 8 - Business Risk and Credit Risk Concentration Involving Cash (Details Textual) $ in Millions |
12 Months Ended | |
|---|---|---|
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2024 |
|
| Cash, Uninsured Amount | $ 2.6 | |
| Customer Concentration Risk [Member] | Revenue Benchmark [Member] | ||
| Number Of Customers | 4 | 3 |
| Customer Concentration Risk [Member] | Accounts Receivable [Member] | ||
| Number Of Customers | 2 | 1 |