v3.19.3.a.u2

Stock-Based Compensation (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |
Summary of Stock Option Activity | The following represents a summary of the options granted to employees and non-employees that are outstanding at September 30, 2019 and changes during the period then ended:
|  | Options |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contractual Life (in years) |
Outstanding at December 31, 2018 |  |  | 673,885 |  |  | $ | 19.82 |  |  | $ | ― |  |  |  | 8.2 |
Granted |  |  | 698,750 |  |  | $ | 0.62 |  |  | $ | ― |  |  |  | 9.0 |
Exercised/ Expired/ Forfeited |  |  | (28,500 | ) |  | $ | 0.98 |  |  | $ | ― |  |  |  | ― |
Outstanding at September 30, 2019 |  |  | 1,344,135 |  |  | $ | 10.24 |  |  | $ | ― |  |  |  | 8.4 |
Exercisable at September 30, 2019 |  |  | 531,528 |  |  | $ | 28.66 |  |  | $ | ― |  |  |  | 7.4 |
| The following represents a summary of the options granted to employees and non-employees that are outstanding at December 31, 2018 and changes during the period then ended:
|  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted- Average Remaining Contractual Life (in years) |
Outstanding at December 31, 2017 |  |  | 254,171 |  |  | $ | 47.43 |  |  | $ | ― |  |  |  | 7.3 |
Options granted |  |  | 456,718 |  |  |  | 3.16 |  |  |  | ― |  |  |  | 8.6 |
Options forfeited |  |  | (37,004 | ) |  |  | 3.90 |  |  |  | ― |  |  |  | ― |
Outstanding at December 31, 2018 |  |  | 673,885 |  |  |  | 19.82 |  |  |  | ― |  |  |  | 8.2 |
Exercisable at December 31, 2018 |  |  | 290,818 |  |  | $ | 50.19 |  |  | $ | ― |  |  |  | 6.9 |
Schedule of Assumptions Used in Black-Scholes Option-Pricing Method | The material factors incorporated in the Black-Scholes model in estimating the fair value of the options granted for the periods presented were as follows (three months ended September 30, 2018 stock price adjusted for 1-for-10 reverse stock split):
|  | For the three months ended September 30, |  |  | For the nine months ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Expected stock-price volatility |  |  | 69.00% – 69.38 | % |  |  | 48.89% – 50.22 | % |  |  | 46.33% – 69.38 | % |  |  | 46.47% – 53.11 | %
Risk-free interest rate |  |  | 1.47% – 1.54 | % |  |  | 2.78% – 3.07 | % |  |  | 1.47% – 2.60 | % |  |  | 2.46% – 3.07 | %
Expected average term of options |  |  | 5 –7 |  |  |  | 7 – 10 |  |  |  | 5 – 7 |  |  |  | 5 – 10 |
Stock price |  | $ | 1.04 |  |  | $ | 1.85 – $2.22 |  |  | $ | 0.60 – $1.04 |  |  | $ | 1.85 – $3.40 |
| The material factors incorporated in the Black-Scholes model in estimating the fair value of the options granted for the periods presented were as follows (adjusted for 1-for-10 reverse stock split):
|  | For the year ended December 31, |
|  | 2018 |  |  | 2017 |
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Expected stock-price volatility |  |  | 46.47% - 53.11 | % |  |  | 53.08% - 54.08 | %
Risk-free interest rate |  |  | 2.46% - 3.07 | % |  |  | 1.89% - 2.58 | %
Term of options |  |  | 5 - 10 |  |  |  | 10 |
Stock price |  | $ | 1.85 - $3.40 |  |  | $ | 0.30 - $3.48 |
Schedule of Nonvested Restricted Stock Units | The following table summarizes restricted stock unit activity for the nine months ended September 30, 2019:
|  | Number of Units |  |  | Weighted Average Grant Date Fair Value |
Unvested at December 31, 2018 |  |  | 1,100,000 |  |  | $ | 2.73 |
Granted |  |  | 35,000 |  |  |  | 0.63 |
Forfeited |  |  | ― |  |  |  | ― |
Expired |  |  | (35,000 | ) |  |  | 0.63 |
Unvested at September 30, 2019 |  |  | 1,100,000 |  |  | $ | 2.73 |

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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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