Note 9 - Leases (Details Textual) - USD ($) $ in Millions |
Jun. 30, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Buildings and Equipment [Member] | ||
| Operating Lease, Right-of-Use Asset | $ 0.1 | $ 0.2 |
| Minimum [Member] | ||
| Lessee, Operating Lease, Remaining Lease Term (Month) | 2 months | |
| Maximum [Member] | ||
| Lessee, Operating Lease, Remaining Lease Term (Month) | 13 months |