Note 17 - Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands |
Jun. 30, 2017 |
Jun. 30, 2016 |
|---|---|---|
| Cash equivalents | $ 65,031 | $ 60,479 |
| Available-for-sale Securities | 0 | |
| Total | 65,031 | 60,479 |
| Fair Value, Inputs, Level 1 [Member] | ||
| Cash equivalents | 65,031 | 60,479 |
| Available-for-sale Securities | ||
| Total | 65,031 | 60,479 |
| Fair Value, Inputs, Level 2 [Member] | ||
| Cash equivalents | ||
| Available-for-sale Securities | ||
| Total |