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Stock Options and Warrants (Tables) | 12 Months Ended
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Dec. 31, 2020
Warrant [Member] |
Schedule of stock options/ warrants outstanding |
|  |  |  |  |  |  |  | Wtd. Avg. |
|  |  |  |  | Wtd. Avg. |  |  | Remaining |
|  |  |  |  | Exercise |  |  | Contractual |
|  | Warrants |  |  | Price |  |  | Life (years) |
Balance, January 1, 2019 |  |  | 2,239,762 |  |  | $ | 3.10 |  |  |  | 3.35 |
Granted during the period |  |  | - |  |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | (56,800 | ) |  |  | 10.80 |  |  |  | - |
Balance, December 31, 2019 |  |  | 2,182,962 |  |  | $ | 2.90 |  |  |  | 2.43 |
Granted during the period |  |  | - |  |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | - |  |  | $ | - |  |  |  | - |
Balance, December 31, 2020 |  |  | 2,182,962 |  |  | $ | 2.90 |  |  |  | 1.43 |
Exercisable at December 31, 2020 |  |  | 2,182,962 |  |  | $ | 2.90 |  |  |  | 1.43 |
Employee Stock Option [Member] |
Schedule of fair values of stock options granted |
|  | 2020 |  |  | 2019 |
Risk-free interest rates |  |  | 0.22% - 1.61 | % |  |  | 1.87% - 2.60 | %
Expected life (in years) |  |  | 2.50 - 4.00 |  |  |  | 4.90 - 6.80 |
Expected volatility |  |  | 71.5% - 75.4 | % |  |  | 65.8% - 72.4 | %
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Weighted-average grant date fair value per share |  | $ | 0.64 |  |  | $ | 0.50 |
Schedule of company's stock options |
|  | Number |  |  |  |  |  | Wtd. Avg, |  | Wtd. Avg. |
Range of Exercise Price |  | Outstanding |  |  | Exercisable |  |  | Life |  | Exercise Price |
$0.00 - $5.00 |  |  | 1,784,000 |  |  |  | 1,414,000 |  |  | 3.69 years |  | $ | 1.25 |
$5.01 - $15.00 |  |  | 75,000 |  |  |  | 75,000 |  |  | 0.32 years |  | $ | 8.85 |
$0.00 - $15.00 |  |  | 1,859,000 |  |  |  | 1,489,000 |  |  | 3.55 years |  | $ | 1.56 |
Schedule of stock options/ warrants outstanding |
|  |  |  |  | Wtd. Avg. |
|  |  |  |  | Exercise |
|  | Options |  |  | Price |
Balance, January 1, 2019 |  |  | 838,149 |  |  | $ | 3.08 |
Granted during the period |  |  | 613,000 |  |  |  | 0.96 |
Exercised during the period |  |  | (15,000 | ) |  |  | 0.88 |
Terminated/Expired during the period |  |  | (66,500 | ) |  |  | 7.46 |
Balance, December 31, 2019 |  |  | 1,369,649 |  |  | $ | 2.01 |
Granted during the period |  |  | 560,000 |  |  |  | 1.20 |
Exercised during the period |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | (70,649 | ) |  |  | 7.48 |
Balance, December 31, 2020 |  |  | 1,859,000 |  |  | $ | 1.56 |
Exercisable at December 31, 2020 |  |  | 1,488,997 |  |  | $ | 1.68 |

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