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Note 9 - Stock Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
Non-vested grants at December 31, 2020 |  |  | 324,250 |
Vested – average weighted share price on vesting date was $1.63 |  |  | (3,500 | )
Forfeited |  |  | (12,500 | )
Non-vested grants at September 30, 2021 |  |  | 308,250 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
Vesting Year |  | RSUs Vesting |
2021 |  |  | 298,250 |
2022 |  |  | — |
2023 |  |  | 10,000 |
|  |  | 308,250 |

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