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STOCK OPTIONS AND WARRANTS (Details 2) - $ / shares | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Options outstanding, weighted average exercise price | $ 4.61 | $ 3.36 | $ 4.41 | $ 4,369.60
Stock Option [Member] |  |  |  |
Options exercisable, number exercisable | 497,283 |  |  |
Options outstanding, number outstanding | 2,362,390 |  |  |
Exercise Price $16.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 16.00 |  |  |
Options exercisable, number exercisable | 2,500 |  |  |
Options outstanding, weighted average exercise price | $ 16.00 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 1 year 4 months 20 days |  |  |
Options outstanding, number outstanding | 2,500 |  |  |
Exercise Price $8.00 - $9.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 8.41 |  |  |
Options exercisable, number exercisable | 48,733 |  |  |
Options outstanding, weighted average exercise price | $ 8.43 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 4 years 6 months 18 days |  |  |
Options outstanding, number outstanding | 180,200 |  |  |
Exercise Price $6.00 - $7.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 6.37 |  |  |
Options exercisable, number exercisable | 13,767 |  |  |
Options outstanding, weighted average exercise price | $ 6.30 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 3 years 6 months 18 days |  |  |
Options outstanding, number outstanding | 212,934 |  |  |
Exercise Price $4.00 - $5.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 4.62 |  |  |
Options exercisable, number exercisable | 129,000 |  |  |
Options outstanding, weighted average exercise price | $ 4.60 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 4 years 8 months 8 days |  |  |
Options outstanding, number outstanding | 943,000 |  |  |
Exercise Prices $3.00 - $4.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 3.63 |  |  |
Options exercisable, number exercisable | 76,946 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 4 years 5 months 19 days |  |  |
Options outstanding, number outstanding | 797,419 |  |  |
Options Outstanding, exercise prices | $ 3.91 |  |  |
Exercise Prices 1.00 - $2.00 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 1.44 |  |  |
Options exercisable, number exercisable | 35,869 |  |  |
Options outstanding, weighted average exercise price | $ 1.44 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 2 years 5 months 12 days |  |  |
Options outstanding, number outstanding | 35,869 |  |  |
Exercise Price $2.56 [Member] | Stock Option [Member] |  |  |  |
Options exercisable, Weighted average exercise price | $ 2.56 |  |  |
Options exercisable, number exercisable | 190,468 |  |  |
Options outstanding, weighted average exercise price | $ 2.56 |  |  |
Option outstanding, weighted average remaining contractual life (years) | 2 years 7 months 2 days |  |  |
Options outstanding, number outstanding | 190,468 |  |  |

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