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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
SCHEDULE OF WEIGHTED-AVERAGE ASSUMPTIONS TO ESTIMATE THE FAIR VALUE OF THE OPTIONS GRANTED | We used the following weighted-average assumptions to estimate the grant date fair value of the stock options granted for the years indicated: SCHEDULE OF WEIGHTED-AVERAGE ASSUMPTIONS TO ESTIMATE THE FAIR VALUE OF THE OPTIONS GRANTED
|  | For the years ended December 31, |
|  | 2020 |  |  | 2019 |
Expected volatility |  |  | 110 | % |  |  | 108 | %
Expected term |  |  | 6.2 years |  |  |  | 5.1 years |
Risk-free interest rate |  |  | 0.30 | % |  |  | 2.21 | %
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
2015 Equity Incentive Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
SCHEDULE OF OPTIONS ACTIVITY | Summarized stock option information for the 2015 Equity Incentive Plan is as follows: SCHEDULE OF OPTIONS ACTIVITY
|  | Options |  |  | Weighted- average exercise price |
Outstanding options at January 1, 2019 |  |  | 5,525,405 |  |  | $ | 8.08 |
Granted, fair value of $5.14 per share |  |  | 1,490,490 |  |  | $ | 6.53 |
Exercised |  |  | (303,129 | ) |  |  | 3.20 |
Expired/forfeited |  |  | (917,371 | ) |  |  | 7.95 |
Outstanding options at December 31, 2019 |  |  | 5,795,395 |  |  | $ | 7.96 |
Outstanding options at January 01, 2020 |  |  | 5,795,395 |  |  |  | 7.96 |
Granted, fair value of $1.88 per share |  |  | 2,645,146 |  |  | $ | 2.26 |
Exercised |  |  | (77,560 | ) |  |  | 2.28 |
Expired/forfeited |  |  | (2,802,242 | ) |  |  | 6.52 |
Outstanding options at December 31, 2020 |  |  | 5,560,739 |  |  | $ | 2.21 |
Non-vested options at December 31, 2019 |  |  | 2,342,706 |  |  | $ | 8.78 |
Non-vested options at December 31, 2020 |  |  | 2,507,203 |  |  | $ | 1.29 |
SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE | Further information regarding options outstanding under the 2015 Equity Incentive Plan as of December 31, 2020 is summarized below: SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE
|  |  |  |  |  |  |  |  | Weighted-average |  |  |  |  |  | Weighted-average |
Range of exercise prices |  |  | Number of options outstanding |  |  | Remaining life in years |  |  | Exercise price |  |  | Number of options exercisable |  |  | Remaining life in years |  |  | Exercise price |
$ | 1.02 |  |  | $ | 1.28 |  |  |  | 4,562,630 |  |  |  | 7.8 |  |  | $ | 1.20 |  |  |  | 2,077,915 |  |  |  | 6.3 |  |  | $ | 1.23 |
| 2.31 |  |  |  | 2.59 |  |  |  | 161,642 |  |  |  | 1.4 |  |  |  | 2.31 |  |  |  | 161,642 |  |  |  | 1.4 |  |  |  | 2.31 |
| 4.38 |  |  |  | 4.78 |  |  |  | 357,925 |  |  |  | 3.2 |  |  |  | 4.43 |  |  |  | 357,925 |  |  |  | 3.2 |  |  |  | 4.43 |
| 6.59 |  |  |  | 7.42 |  |  |  | 298,865 |  |  |  | 2.6 |  |  |  | 7.33 |  |  |  | 298,865 |  |  |  | 2.6 |  |  |  | 7.33 |
| 8.54 |  |  |  | 13.65 |  |  |  | 66,567 |  |  |  | 6.5 |  |  |  | 13.26 |  |  |  | 47,817 |  |  |  | 6.3 |  |  |  | 13.10 |
| 14.45 |  |  |  | 16.02 |  |  |  | 113,110 |  |  |  | 1.1 |  |  |  | 15.96 |  |  |  | 109,372 |  |  |  | 1.0 |  |  |  | 15.96 |
|  |  |  |  |  |  |  |  | 5,560,739 |  |  |  |  |  |  |  |  |  |  |  | 3,053,536 |  |  |  |  |  |  |  |  |
SUMMARY OF RESTRICTED STOCK ACTIVITY | Restricted Common Stock: Summarized stock option information for the 2015 Equity Incentive Plan is as follows: SUMMARY OF RESTRICTED STOCK ACTIVITY
|  | Restricted common stock awards |  |  | Weighted- average grant date fair value |
Outstanding awards at January 1, 2019 |  |  | - |  |  | $ | - |
Granted |  |  | 376,625 |  |  | $ | 3.14 |
Vested |  |  | - |  |  |  | - |
Forfeited |  |  | (22,000 | ) |  |  | 3.14 |
Outstanding awards at December 31, 2019 |  |  | 354,625 |  |  | $ | 3.14 |
Outstanding awards at January 01, 2020 |  |  | 354,625 |  |  |  | 3.14 |
Granted |  |  | 5,290,312 |  |  | $ | 1.75 |
Vested |  |  | (817,054 | ) |  |  | 2.26 |
Forfeited |  |  | (1,875,384 | ) |  |  | 1.75 |
Outstanding awards at December 31, 2020 |  |  | 2,952,499 |  |  | $ | 1.78 |
2005 Equity Incentive Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
SCHEDULE OF OPTIONS ACTIVITY | Summarized information for the 2005 Equity Incentive Plan is as follows: SCHEDULE OF OPTIONS ACTIVITY
|  | Options |  |  | Weighted- average exercise price |
Outstanding options at January 1, 2019 |  |  | 316,400 |  |  | $ | 14.15 |
Expired/forfeited |  |  | (56,400 | ) |  |  | 19.75 |
Outstanding options at December 31, 2019 |  |  | 260,000 |  |  | $ | 12.94 |
Outstanding options at January 01, 2020 |  |  | 260,000 |  |  |  | 12.94 |
Expired/forfeited |  |  | (135,200 | ) |  |  | 6.80 |
Outstanding options at December 31, 2020 |  |  | 124,800 |  |  | $ | 8.55 |
SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE | Further information regarding options outstanding under the 2005 Equity Incentive Plan as of December 31, 2020 is summarized below: SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE
|  |  |  |  |  |  |  |  | Weighted-average |  |  |  |  |  | Weighted-average |
Range of exercise prices |  |  | Number of options outstanding |  |  | Remaining life in years |  |  | Exercise price |  |  | Number of options exercisable |  |  | Remaining life in years |  |  | Exercise price |
$ | 1.28 |  |  | $ | 1.28 |  |  |  | 80,000 |  |  |  | 3.2 |  |  | $ | 1.28 |  |  |  | 80,000 |  |  |  | 3.2 |  |  | $ | 1.28 |
| 11.50 |  |  |  | 18.50 |  |  |  | 42,000 |  |  |  | 2.4 |  |  |  | 18.17 |  |  |  | 42,000 |  |  |  | 2.4 |  |  |  | 18.17 |
| 30.50 |  |  |  | 113.50 |  |  |  | 2,800 |  |  |  | 0.6 |  |  |  | 72.00 |  |  |  | 2,800 |  |  |  | 0.6 |  |  |  | 72.00 |
|  |  |  |  |  |  |  |  | 124,800 |  |  |  |  |  |  |  |  |  |  |  | 124,800 |  |  |  |  |  |  |  |  |

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