Note 11 - Liability Related to Sale of Future Royalties - Activity of Liability Related to Sale of Future Royalties (Details) - USD ($) $ in Thousands |
1 Months Ended | 12 Months Ended | 87 Months Ended | ||
|---|---|---|---|---|---|
May 31, 2022 |
Sep. 30, 2015 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2022 |
|
| Liability related to sale of future royalties — beginning balance | $ 85,288 | $ 0 | |||
| Proceeds from sale of future royalties | $ 61,200 | 0 | 61,184 | ||
| Non-cash royalty revenue | 0 | (1,083) | |||
| Non-cash interest (income) expense recognized | (1,136) | $ (3,038) | 24,051 | ||
| Consideration paid for termination of Royalty Monetization | $ (100) | (100) | (100) | ||
| Gain on termination of liability related to sale of future royalties | (84,052) | $ 0 | (84,052) | ||
| Liability related to sale of future royalties as of December 31, 2022 | $ 0 | $ 0 | |||