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Capital Stock, Stock Plans, Warrants and Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes stock-based compensation recognized for the three months ended March 31, 2021 and 2020 for our employee and director stock options.
|  | Three Months Ended |
Stock Options |  | March 31, |
|  | 2021 |  |  | 2020 |
Employee Stock Options |  | $ | 33,000 |  |  | $ | 32,000 |
Director Stock Options |  |  | 12,000 |  |  |  | 12,000 |
Total |  | $ | 45,000 |  |  | $ | 44,000 |
Schedule of Stock Options Roll Forward | The summary of the Company’s total Stock Option Plans as of March 31, 2021 and March 31, 2020, and changes during the periods then ended, are presented below. The Company’s Plans consist of the 2010 Stock Option Plan, the 2017 Plan and the 2003 Outside Directors Stock Plan (“2003 Plan”):
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (3) |
Options outstanding January 1, 2021 |  |  | 658,400 |  |  | $ | 3.87 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |
Forfeited/expired |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Options outstanding end of period (1) |  |  | 658,400 |  |  | $ | 3.87 |  |  |  | 3.2 |  |  | $ | 2,279,267 |
Options exercisable at March 31, 2021(1) |  |  | 392,400 |  |  | $ | 4.08 |  |  |  | 3.4 |  |  | $ | 1,274,287 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (3) |
Options outstanding January 1, 2020 |  |  | 681,300 |  |  | $ | 3.84 |  |  |  |  |  |  |  |  |
Granted |  |  | 6,000 |  |  |  | 7.00 |  |  |  |  |  |  |  |  |
Exercised |  |  | (12,000 | ) |  |  | 3.48 |  |  |  |  |  |  |  | 14,600 |
Forfeited/expired |  |  | (20,000 | ) |  |  | 3.45 |  |  |  |  |  |  |  |  |
Options outstanding end of period (2) |  |  | 655,300 |  |  | $ | 3.88 |  |  |  | 4.0 |  |  | $ | 962,189 |
Options exercisable at March 31, 2020(2) |  |  | 306,800 |  |  | $ | 4.20 |  |  |  | 3.9 |  |  | $ | 392,614 |
(1) Options with exercise prices ranging from $2.79 to $7.29 (2) Options with exercise prices ranging from $2.79 to $8.40 (3) The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option.

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