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Stock-Based Compensation and Warrants (Tables) | 12 Months Ended
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Dec. 31, 2020
Stock-Based Compensation and Warrants |
Schedule of assumptions used for awards |
|  | Year ended December 31, |
|  | 2020 |  | 2019 |
Exercise price |  | $ | 0.42 |  | $ | 0.42 |
Expected dividends |  |  | 0 | % |  | 0 | %
Expected volatility |  |  | 88 | % |  | 84 | %
Risk free interest rate |  |  | 0.31 | % |  | 1.61 | %
Expected life of option (years) |  |  | 4.3 |  |  | 4.5 |
Summary of stock option activity | A summary of stock option activity for the years ended December 31, 2020 and 2019 is as follows:
|  |  |  | Weighted |  | Weighted Average |  | Aggregate
|  |  |  | Average Exercise |  | Remaining |  | Intrinsic
|  | Options |  | Price |  | Contractual Life |  | Value
Balance - December 31, 2018 |  | 938,982 |  | $ | 15.18 |  | 6.19 years |  | $ | —
Granted |  | 1,725,000 |  |  | 0.42 |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Expired |  | (94,738) |  |  | 58.25 |  |  |  |  |
Forfeited |  | (67,232) |  |  | 5.95 |  |  |  |  |
Balance - December 31, 2019 |  | 2,502,012 |  |  | 3.62 |  | 6.51 years |  |  | 153,353
Granted |  | 1,540,000 |  |  | 0.42 |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Expired |  | (14,944) |  |  | 17.57 |  |  |  |  |
Forfeited |  | (29,650) |  |  | 0.55 |  |  |  |  |
Balance -December 31, 2020 - outstanding |  | 3,997,418 |  | $ | 2.35 |  | 6.09 years |  | $ | —
Balance - December 31, 2020 - exercisable |  | 1,319,412 |  | $ | 6.25 |  | 4.35 years |  | $ | —
Grant date fair value of options granted - December 31, 2020 |  |  |  | $ | 412,000 |  |  |  |  |
Weighted average grant date fair value - December 31, 2020 |  |  |  | $ | 0.27 |  |  |  |  |
Grant date fair value of options granted - December 31, 2019 |  |  |  | $ | 470,000 |  |  |  |  |
Weighted average grant date fair value - December 31, 2019 |  |  |  | $ | 0.27 |  |  |  |  |
Schedule of options outstanding and exercisable | The options outstanding and exercisable at December 31, 2020 are as follows:
Options Outstanding |  | Options Exercisable
|  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted
|  |  |  |  | Weighted |  | Average |  |  |  | Weighted |  | Average
|  |  |  |  | Average |  | Remaining |  |  |  | Average |  | Remaining
Range of |  |  |  | Exercise |  | Contractual |  |  |  | Exercise |  | Contractual
Exercise Price |  | Options |  | Price |  | Life |  | Options |  | Price |  | Life
$ | 0.00 – $40.00 |  | 3,929,257 |  | $ | 0.99 |  | 4.42 years |  | 1,251,251 |  | $ | 2.18 |  | 4.42 years
| 41.00 – $70.00 |  | 8,364 |  |  | 50.29 |  | 2.53 years |  | 8,364 |  |  | 50.29 |  | 2.53 years
$ | 71.00 – $102.00 |  | 59,797 |  | $ | 85.19 |  | 3.13 years |  | 59,797 |  | $ | 85.19 |  | 3.13 years
Summary of all warrant activity | A summary of all warrant activity for the Company for the years ended December 31, 2020 and 2019 is as follows:
|  | Number of |  | Weighted Average
|  | Warrants |  | Exercise Price
Balance at December 31,2018 |  | 18,915,851 |  | $ | 3.85
Granted |  | — |  |  | —
Exercised |  | — |  |  | —
Forfeited |  | (200,852) |  |  | 61.25
Balance at December 31,2019 |  | 18,714,999 |  |  | 3.24
Granted |  | — |  |  | —
Exercised |  | — |  |  | —
Forfeited |  | (714,286) |  |  | 50.05
Balance at December 31,2020 |  | 18,000,713 |  | $ | 0.69
Summary of all outstanding and exercisable warrants | A summary of all outstanding and exercisable warrants as of December 31, 2020 is as follows:
|  |  |  |  |  |  | Weighted Average
|  |  | Warrants |  | Warrants |  | Remaining
Exercise Price |  | Outstanding |  | Exercisable |  | Contractual Life
$ | 0.69 |  | 17,999,999 |  | 17,999,999 |  | 2.78 years
| 18.20 |  | 714 |  | 714 |  | 1.99 years
$ | 0.69 |  | 18,000,713 |  | 18,000,713 |  | 2.78 years

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