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Stock Options and Warrants (Tables) | 12 Months Ended
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Dec. 31, 2018
Warrant [Member] |
Schedule of company's stock options |
|  | Warrants |  |  | Wtd. Avg. Exercise Price |  |  | Wtd. Ave. Remaining Contractual Life (years) |
Balance, January 1, 2017 |  |  | 840,276 |  |  | $ | 5.13 |  |  |  | 4.01 |
Granted during the period |  |  | 971,611 |  |  |  | 2.61 |  |  |  | 4.42 |
Exercised during the period |  |  | - |  |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | (107,785 | ) |  |  | 3.62 |  |  |  | - |
Balance, December 31, 2017 |  |  | 1,704,102 |  |  |  | 2.66 |  |  |  | 4.04 |
Granted during the period |  |  | 535,600 |  |  |  | 1.45 |  |  |  | 4.35 |
Terminated/Expired during the period |  |  | - |  |  |  | - |  |  |  | - |
Balance, December 31, 2018 |  |  | 2,239,702 |  |  | $ | 3.10 |  |  |  | 3.35 |
Exercisable at December 31, 2018 |  |  | 2,239,702 |  |  | $ | 3.10 |  |  |  | 3.35 |
Schedule of stock options/ warrants granted |
|  | 2018 |  |  | 2017 |
Risk-free interest rates |  |  | 2.33 | % |  |  | 1.85% - 2.20% |
Expected life (in years) |  |  | 4.9 |  |  |  | 5 |
Expected volatility |  |  | 116 | % |  |  | 63%-115% |
Dividend yield |  |  | 0 |  |  |  | 0 |
Weighted-average grant date fair value per share |  | $ | 1.24 |  |  |  | $1.10-$2.89 |
Employee Stock Option [Member] |
Schedule of fair values of stock options granted |
|  | 2018 |  |  | 2017 |
Risk-free interest rates |  |  | 2.69 | % |  |  | 1.72% - 1.81 | %
Expected life (in years) |  |  | 4.9 |  |  |  | 4.9 |
Expected volatility |  |  | 66 | % |  |  | 82% - 85 | %
Dividend yield |  |  | 0.0 | % |  |  | 0.0 | %
Weighted-average grant date fair value per share |  | $ | 0.72 |  |  | $ | 0.90 |
Schedule of company's stock options |
|  | Options |  |  | Wtd. Avg. Exercise Price |
Balance, January 1, 2017 |  |  | 636,342 |  |  | $ | 7.01 |
Granted during the period |  |  | 695,000 |  |  |  | 1.45 |
Exercised during the period |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | (285,715 | ) |  |  | 7.66 |
Balance, December 31, 2017 |  |  | 1,048,627 |  |  |  | 3.20 |
Granted during the period |  |  | 88,000 |  |  |  | 1.56 |
Exercised during the period |  |  | - |  |  |  | - |
Terminated/Expired during the period |  |  | (298,478 | ) |  |  | 3.04 |
Balance, December 31, 2018 |  |  | 838,149 |  |  | $ | 3.08 |
Exercisable at December 31, 2018 |  |  | 598,149 |  |  | $ | 3.73 |
Schedule of stock options/ warrants granted |
Range of Exercise Prices |  |  | Number Outstanding |  |  | Wtd. Avg. Life |  | Wtd. Avg. Exercise Price |
$ | 0.00 - $5.00 |  |  |  | 646,000 |  |  | 5.2 years |  | $ | 8.18 |
$ | 5.01 - $20.00 |  |  |  | 192,149 |  |  | 1.6 years |  |  | 1.56 |
$ | 0.00 - $20.00 |  |  |  | 838,149 |  |  | 4.4 years |  | $ | 3.08 |

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