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Note J - Stock Option Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding December 31, 2017 |  |  | 1,985,335 |  |  |  | 1.74 |  |  |  | 3.04 |  |  |  | 25,160 |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised during 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (315,114 | ) |  |  | 1.50 |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2018 |  |  | 1,670,221 |  |  |  | 1.71 |  |  |  | 2.40 |  |  |  | - |
Exercisable, December 31, 2018 |  |  | 1,317,632 |  |  |  | 1.79 |  |  |  | 2.15 |  |  |  | - |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised during 2019 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (457,779 | ) |  |  | 1.96 |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2019 |  |  | 1,212,442 |  |  |  | 1.61 |  |  |  | 2.00 |  |  |  | 114,570 |
Exercisable, December 31, 2019 |  |  | 1,117,834 |  |  |  | 1.65 |  |  |  | 1.90 |  |  |  | 88,982 |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding December 31, 2017 |  |  | 224,999 |  |  |  | 2.53 |  |  |  | 4.32 |  |  |  | - |
Granted |  |  | 8,333 |  |  |  | 0.75 |  |  |  | 4.33 |  |  |  |  |
Exercised during 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (200,000 | ) |  |  | 2.55 |  |  |  | - |  |  |  |  |
Options outstanding December 31, 2018 |  |  | 33,332 |  |  |  | 1.87 |  |  |  | 2.94 |  |  |  |  |
Exercisable, December 31, 2018 |  |  | 27,777 |  |  |  | 2.10 |  |  |  | 2.66 |  |  |  |  |
Granted |  |  | 16,666 |  |  |  | 0.55 |  |  |  | 4.43 |  |  |  | 13,999 |
Exercised during 2019 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | - |  |  |  | - |  |  |  | - |  |  |  |  |
Options outstanding December 31, 2019 |  |  | 49,998 |  |  |  | 1.43 |  |  |  | 2.94 |  |  |  | 19,333 |
Exercisable, December 31, 2019 |  |  | 36,109 |  |  |  | 1.76 |  |  |  | 2.44 |  |  |  | 8,222 |

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