Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 0 | $ 0 |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 0 | 0 |
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 34.00% | |
| Unrecognized Tax Benefits | $ 0 | $ 0 |