Note 17 - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands |
Jun. 30, 2016 |
Jun. 30, 2015 |
|---|---|---|
| Fair Value, Inputs, Level 1 [Member] | ||
| Cash equivalents | $ 60,479 | $ 84,192 |
| Available-for-sale securities | ||
| Total | 60,479 | 84,192 |
| Total | 60,479 | 84,192 |
| Fair Value, Inputs, Level 2 [Member] | ||
| Cash equivalents | ||
| Available-for-sale securities | 2,198 | |
| Total | 2,198 | |
| Total | 2,198 | |
| Fair Value, Inputs, Level 3 [Member] | ||
| Cash equivalents | ||
| Available-for-sale securities | ||
| Total | ||
| Total | ||
| Cash equivalents | 60,479 | 84,192 |
| Available-for-sale securities | 2,198 | |
| Total | 60,479 | 86,390 |
| Total | $ 60,479 | $ 86,390 |