Note 12 - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Jun. 30, 2015 |
|---|---|---|
| Fair Value, Inputs, Level 1 [Member] | ||
| Cash equivalents | $ 64,837 | $ 84,192 |
| Available-for-sale securities | ||
| Total | $ 64,837 | $ 84,192 |
| Fair Value, Inputs, Level 2 [Member] | ||
| Cash equivalents | ||
| Available-for-sale securities | $ 2,198 | |
| Total | $ 2,198 | |
| Fair Value, Inputs, Level 3 [Member] | ||
| Cash equivalents | ||
| Available-for-sale securities | ||
| Total | ||
| Cash equivalents | $ 64,837 | $ 84,192 |
| Available-for-sale securities | 2,198 | |
| Total | $ 64,837 | $ 86,390 |