Note 1 - Organization - Revision of Prior Period (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
| Net cash used in operating activities | $ 2,222,000 | $ (8,672,000) | |
| Proceeds from leasing of building | 12,278,000 | 636,000 | |
| Net cash provided by financing activities | $ 22,588,000 | 11,508,000 | |
| Previously Reported [Member] | |||
| Lease of building | |||
| Net cash used in operating activities | (9,308,000) | ||
| Proceeds from leasing of building | 636,000 | ||
| Net cash provided by financing activities | 12,144,000 | ||
| Revision of Prior Period, Adjustment [Member] | |||
| Lease of building | 636,000 | ||
| Net cash used in operating activities | $ 636,000 | 636,000 | |
| Proceeds from leasing of building | (636,000) | ||
| Net cash provided by financing activities | $ (636,000) | (636,000) | |
| As Revised [Member] | |||
| Lease of building | 636,000 | ||
| Net cash used in operating activities | (8,672,000) | ||
| Proceeds from leasing of building | 0 | ||
| Net cash provided by financing activities | $ 11,508,000 | ||