|
Note 2 - Cash, Cash Equivalents and Investments (Details) - Level 3 Investments (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Level 3 Investments [Abstract] | ||
| Ending Balances | $ 11,755 | $ 13,675 |
| Sales and Settlement at Par | (2,025) | (2,100) |
| Realized gain included in interest and other income, net | 40 | |
| Change in unrealized gain (loss) on available-for-sale securities | 130 | 140 |
| Ending Balances | $ 9,860 | $ 11,755 |