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Note 6 - Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
Grant date | Award type |  | Number granted |  |  | Grant date fair value |
June 21, 2022 | Restricted stock |  |  | 1,103,801 |  |  |  | $4.43 |
June 21, 2022 | Performance based |  |  | 322,799 |  |  |  | $3.78 |
June 28, 2022 | Directors retainer |  |  | 98,310 |  |  |  | $4.24 |

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