|
Note 9 - Income Taxes (Details) - Effective Income Tax Rate Reconciliation (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Effective Income Tax Rate Reconciliation [Abstract] | |||
| Provision (benefit) at statutory rate | $ (7,096) | $ (3,886) | $ (2,456) |
| State income taxes | 1,651 | 303 | 200 |
| Research and development credits | (7,384) | (5,850) | (1,345) |
| Change in valuation allowance | 5,271 | 6,781 | 15,247 |
| Foreign earnings, taxed at different rates | 6,381 | 2,888 | 1,649 |
| Unrecognized tax benefits | 1,713 | 1,708 | 1,487 |
| Stock-based compensation | 166 | 142 | 336 |
| Tax exempt income | (83) | (157) | (197) |
| Prior year return to provision adjustment | 292 | (257) | (1,264) |
| Cortina acquisition transaction cost | 444 | ||
| Other | 383 | 80 | 16 |
| $ 1,738 | $ 1,752 | $ 13,673 | |