Note 18 - Income Taxes - Reconciliation of Statutory Federal Income Tax (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Tax at statutory federal rate | $ (7,370) | $ (8,486) |
| State tax—net of federal benefit | 231 | (3,587) |
| Stock options | 718 | 636 |
| Other | (20) | 0 |
| Change in valuation allowance | 6,446 | 11,441 |
| Provision for income taxes | $ 5 | $ 4 |