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Note 11 - Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Stock Incentives Granted |  |  | Stock Incentives Exercised |  |  | Stock Incentives Expired |  |  | Stock Incentives Cancelled |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
2003 Incentive Stock Plan1 § |  |  | N/A |  |  |  | N/A |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2015 Incentive Stock Plan2 § |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Non-Employee Directors’ Stock Option Plan3 § |  |  | N/A |  |  |  | N/A |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2011 Non-Employee Directors Stock Plan4 § |  |  | N/A |  |  |  | N/A |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2020 Non-Employee Directors’ Stock Incentive Plan5 † § |  |  | 6,021 |  |  |  | 8,808 |  |  |  | N/A |  |  |  | N/A |  |  |  | N/A |  |  |  | N/A |  |  |  | N/A |  |  |  | N/A |
2022 Employee Stock Incentive Plan6 † § |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
|  | Total of All Plans |  |  | Fully Vested and Exercisable |  |  | Not Vested |
Stock Incentives Granted |  |  | 1,380,152 |  |  |  | 59,000 |  |  |  | - |
Stock Incentives Exercised |  |  | 1,014,820 |  |  |  | N/A |  |  |  | N/A |
Stock Incentives Cancelled |  |  | 282,680 |  |  |  | N/A |  |  |  | N/A |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | 2023 |  |  | 2022 |
Stock Options outstanding at January 1 |  |  | 59,000 |  |  |  |  | 59,000 |  |
Stock Options cancelled |  |  | – |  |  |  |  | – |  |
Stock Options exercised |  |  | – |  |  |  |  | – |  |
Stock Options granted |  |  | – |  |  |  |  | – |  |
Stock Options outstanding at December 31 |  |  | 59,000 |  |  |  |  | 59,000 |  |
Stock Options available for grant at December 31 |  |  | 926,348 |  |  |  |  | 932,369 |  |
Stock Options exercisable at December 31 |  |  | 59,000 |  |  |  |  | 59,000 |  |
Exercise price ranges per share: |  |  |  |  |  |  |  |  |  |
Granted |  |  | N/A |  |  |  |  | N/A |  |
Exercised |  |  | N/A |  |  |  | $1.52 | - | $1.72 |
Outstanding |  | $3.50 | - | $39.11 |  |  | $3.50 | - | $39.11 |
Weighted average exercise price per share: |  |  |  |  |  |  |  |  |  |
Granted |  |  | – |  |  |  |  | – |  |
Exercised |  |  | – |  |  |  |  | – |  |
Outstanding at December 31 |  |  | 17.35 |  |  |  |  | 17.35 |  |
Exercisable at December 31 |  |  | 17.35 |  |  |  |  | 17.35 |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] |
Options Outstanding and Exercisable: |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Exercise Price |  | Number Outstanding |  |  | Wgt. Avg. Contractual Life Remaining (in years) |  |  | Wgt. Avg. Exercise Price |  |  | Aggregate Intrinsic Value |
$3.50 | - | $3.86 |  |  | 13,000 |  |  |  | 3.2 |  |  | $ | 3.75 |  |  | $ | 131,050 |
$7.80 |  |  |  |  | 8,000 |  |  |  | 4.4 |  |  | $ | 7.80 |  |  | $ | 48,240 |
$19.99 |  |  |  |  | 30,000 |  |  |  | 5.1 |  |  | $ | 19.99 |  |  | $ | – |
$39.11 |  |  |  |  | 8,000 |  |  |  | 5.4 |  |  | $ | 39.11 |  |  | $ | – |
$3.50 | - | $39.11 |  |  | 59,000 |  |  |  | 4.6 |  |  | $ | 17.35 |  |  | $ | 179,290 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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