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NOTE 11 – STOCKHOLDERS’ EQUITY (Tables) | 9 Months Ended
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Sep. 30, 2019
Equity [Abstract] |
The assumptions used in the Black-Scholes Model for options granted during the nine months ended September 30, 2019 and 2018 are set forth in the table below. | The assumptions used in the Black-Scholes Model for options granted during the nine months ended September 30, 2019 and 2018 are set forth in the table below.
| Nine months ended September 30,
| 2019 |  | 2018
Risk-free interest rate | 1.83-2.54% |  | 2.78-2.82%
Volatility | 61.25-64.49% |  | 61.8-63.34%
Term (in years) | 5.5-6.5 |  | 5.5-6.25
Dividend yield | 0.00% |  | 0.00%
A summary of activity under the 2009, 2012 and 2019 Plans and related information follows: | A summary of activity under the 2009, 2012 and 2019 Plans and related information follows:
|  | Number of Shares Underlying Stock Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life in Years |  |  | Aggregate Intrinsic Value |
Balance at December 31, 2018 |  |  | 20,872,824 |  |  | $ | 4.93 |  |  |  | 5.94 years |  |  | $ | 12,239,876 |
Granted |  |  | 4,419,501 |  |  | $ | 3.13 |  |  |  |  |  |  |  |  |
Exercised |  |  | (343,716 | ) |  | $ | 0.32 |  |  |  |  |  |  | $ | 1,426,828 |
Expired/Forfeited |  |  | (98,625 | ) |  | $ | 5.63 |  |  |  |  |  |  |  |  |
Balance at September 30, 2019 |  |  | 24,849,984 |  |  | $ | 4.67 |  |  |  | 6.05 years |  |  | $ | 13,761,778 |
Vested and Exercisable at September 30, 2019 |  |  | 17,601,027 |  |  | $ | 4.85 |  |  |  | 4.81 years |  |  | $ | 9,745,527 |
Unvested at September 30, 2019 |  |  | 7,248,957 |  |  | $ | 4.22 |  |  |  | 9.06 years |  |  | $ | 4,016,251 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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