Note 10 - Income Taxes - Activity Related to Gross Unrecognized Tax Benefits (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
USD ($)
| |
| Note 10 - Income Taxes - Activity Related to Gross Unrecognized Tax Benefits (Details) | |
| Balance | $ 331 |
| Changes related to prior year positions | 330 |
| Increases related to current year positions | 42 |
| Balance | $ 703 |