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SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE (Details) - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
2015 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of options outstanding | 5,560,739 | 5,795,395 | 5,525,405
Weighted-average Remaining life in years | 10 years |  |
Weighted-average Exercise price | $ 2.21 | $ 7.96 | $ 8.08
Number of options exercisable | 3,053,536 |  |
2015 Equity Incentive Plan [Member] | Range One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | $ 1.02 |  |
Range of exercise price, upper limit | $ 1.28 |  |
Number of options outstanding | 4,562,630 |  |
Weighted-average Remaining life in years | 7 years 9 months 18 days |  |
Weighted-average Exercise price | $ 1.20 |  |
Number of options exercisable | 2,077,915 |  |
Weighted-average Remaining life in years, exercisable | 6 years 3 months 18 days |  |
Weighted-average Exercise price, exercisable | $ 1.23 |  |
2015 Equity Incentive Plan [Member] | Range Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 2.31 |  |
Range of exercise price, upper limit | $ 2.59 |  |
Number of options outstanding | 161,642 |  |
Weighted-average Remaining life in years | 1 year 4 months 24 days |  |
Weighted-average Exercise price | $ 2.31 |  |
Number of options exercisable | 161,642 |  |
Weighted-average Remaining life in years, exercisable | 1 year 4 months 24 days |  |
Weighted-average Exercise price, exercisable | $ 2.31 |  |
2015 Equity Incentive Plan [Member] | Range Three [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 4.38 |  |
Range of exercise price, upper limit | $ 4.78 |  |
Number of options outstanding | 357,925 |  |
Weighted-average Remaining life in years | 3 years 2 months 12 days |  |
Weighted-average Exercise price | $ 4.43 |  |
Number of options exercisable | 357,925 |  |
Weighted-average Remaining life in years, exercisable | 3 years 2 months 12 days |  |
Weighted-average Exercise price, exercisable | $ 4.43 |  |
2015 Equity Incentive Plan [Member] | Range Four [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 6.59 |  |
Range of exercise price, upper limit | $ 7.42 |  |
Number of options outstanding | 298,865 |  |
Weighted-average Remaining life in years | 2 years 7 months 6 days |  |
Weighted-average Exercise price | $ 7.33 |  |
Number of options exercisable | 298,865 |  |
Weighted-average Remaining life in years, exercisable | 2 years 7 months 6 days |  |
Weighted-average Exercise price, exercisable | $ 7.33 |  |
2015 Equity Incentive Plan [Member] | Range Five [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 8.54 |  |
Range of exercise price, upper limit | $ 13.65 |  |
Number of options outstanding | 66,567 |  |
Weighted-average Remaining life in years | 6 years 6 months |  |
Weighted-average Exercise price | $ 13.26 |  |
Number of options exercisable | 47,817 |  |
Weighted-average Remaining life in years, exercisable | 6 years 3 months 18 days |  |
Weighted-average Exercise price, exercisable | $ 13.10 |  |
2015 Equity Incentive Plan [Member] | Range six [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 14.45 |  |
Range of exercise price, upper limit | $ 16.02 |  |
Number of options outstanding | 113,110 |  |
Weighted-average Remaining life in years | 1 year 1 month 6 days |  |
Weighted-average Exercise price | $ 15.96 |  |
Number of options exercisable | 109,372 |  |
Weighted-average Remaining life in years, exercisable | 1 year |  |
Weighted-average Exercise price, exercisable | $ 15.96 |  |
2005 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of options outstanding | 124,800 | 260,000 | 316,400
Weighted-average Exercise price | $ 8.55 | $ 12.94 | $ 14.15
Number of options exercisable | 124,800 |  |
2005 Equity Incentive Plan [Member] | Range One [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | $ 1.28 |  |
Range of exercise price, upper limit | $ 1.28 |  |
Number of options outstanding | 80,000 |  |
Weighted-average Remaining life in years | 3 years 2 months 12 days |  |
Weighted-average Exercise price | $ 1.28 |  |
Number of options exercisable | 80,000 |  |
Weighted-average Remaining life in years, exercisable | 3 years 2 months 12 days |  |
Weighted-average Exercise price, exercisable | $ 1.28 |  |
2005 Equity Incentive Plan [Member] | Range Two [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 11.50 |  |
Range of exercise price, upper limit | $ 18.50 |  |
Number of options outstanding | 42,000 |  |
Weighted-average Remaining life in years | 2 years 4 months 24 days |  |
Weighted-average Exercise price | $ 18.17 |  |
Number of options exercisable | 42,000 |  |
Weighted-average Remaining life in years, exercisable | 2 years 4 months 24 days |  |
Weighted-average Exercise price, exercisable | $ 18.17 |  |
2005 Equity Incentive Plan [Member] | Range Three [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of exercise price, lower limit | 30.50 |  |
Range of exercise price, upper limit | $ 113.50 |  |
Number of options outstanding | 2,800 |  |
Weighted-average Remaining life in years | 7 months 6 days |  |
Weighted-average Exercise price | $ 72.00 |  |
Number of options exercisable | 2,800 |  |
Weighted-average Remaining life in years, exercisable | 7 months 6 days |  |
Weighted-average Exercise price, exercisable | $ 72.00 |  |

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