Note 4 - Balance Sheet Components - Deferred Revenue, by Arrangement, Disclosure 1 (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Government Contract [Member] | |||
| Deferred Revenue, Balance | $ 68,000 | $ 65,400,000 | $ 0 |
| Revenue recognized | (45,000) | (65,513,000) | 0 |
| Amounts collected or invoiced | 0 | 181,000 | 65,400,000 |
| Deferred Revenue, Balance | 23,000 | 68,000 | 65,400,000 |
| Current portion | (23,000) | (68,000) | (65,400,000) |
| Collaboration Revenue [Member] | |||
| Deferred Revenue, Balance | 14,976,000 | 0 | |
| Revenue recognized | (2,815,000) | (2,108,000) | |
| Amounts collected or invoiced | 0 | 17,084,000 | |
| Deferred Revenue, Balance | 12,161,000 | 14,976,000 | 0 |
| Current portion | (11,716,000) | (12,952,000) | 0 |
| Deferred Revenue, Noncurrent | $ 445,000 | $ 2,024,000 | $ 0 |