Note 18 - Income Taxes - Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Unrecognized benefit—beginning of period | $ 2,635 | $ 2,635 |
| Gross increases—prior period tax positions | 0 | 0 |
| Gross increases—current period tax positions | 0 | 0 |
| Unrecognized benefit—end of period | $ 2,635 | $ 2,635 |