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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2020
Shareholders' Equity |
Schedule of Weighted Average Assumptions | The following weighted-average assumptions were used for stock option awards granted during the three and nine months ended September 30, 2019:
|  | Three months ended |  |  | Nine months ended |
|  | September 30, 2019 |  |  | September 30, 2019 |
Weighted average risk-free rate |  |  | 1.39 | % |  |  | 1.70 | %
Weighted average volatility |  |  | 95.11 | % |  |  | 108.83 | %
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Expected term |  |  | 5.61 years |  |  |  | 5.73 years |
Schedule of Restricted Stock and Common Stock Unit Vested | The following table shows the number of RSUs that vested and were settled during the three and nine months ended September 30, 2020 and 2019, as well as the number of shares of common stock issued upon settlement. In lieu of paying cash to satisfy withholding taxes due upon the settlement of vested RSUs, an employee may elect to have shares of common stock withheld that would otherwise be issued at settlement, the value of which is equal to the amount of withholding taxes payable.
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Restricted stock units vested and settled |  |  | 19,000 |  |  |  | 18,000 |  |  |  | 39,000 |  |  |  | 29,000 |
Common stock issued, net of shares withheld |  |  | 14,000 |  |  |  | 13,000 |  |  |  | 28,000 |  |  |  | 20,000 |

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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=120381028&loc=d3e5070-113901 + Details
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