Note 4 - Sale of Future Payments (Details Textual) - XOMA [Member] - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 6 Months Ended |
|---|---|---|---|
Jan. 31, 2024 |
Jun. 30, 2026 |
Jun. 30, 2026 |
|
| Proceeds From Sale of Receivables | $ 8,000 | ||
| Proceeds from Debt, Net of Issuance Costs | $ 6,600 | ||
| Noncash Revenue | $ 0 | $ 0 | |
| Noncash Interest Expense Recognized | $ 0 | $ 0 |