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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Shareholders' Equity |
Schedule of Weighted Average Assumptions | The following weighted-average assumptions were used for grants issued during 2019 under the ASC No. 718 requirements:
|  | 2019 |
Weighted average risk-free rate |  |  | 1.68 | %
Weighted average volatility |  |  | 105.53 | %
Dividend yield |  |  | 0.00 | %
Expected term |  |  | 5.37 years |
Summary of Stock Option Activity | The following table summarizes stock option activities for the years ended December 31, 2020 and 2019:
|  | Outstanding Options |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value |
Outstanding January 1, 2019 |  |  | 147,000 |  |  | $ | 18.20 |  |  |  | 6.08 |  |  | $ | - |
Granted |  |  | 3,000 |  |  |  | 3.15 |  |  |  | - |  |  |  | - |
Cancelled |  |  | (6,000 | ) |  |  | 13.32 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (2,000 | ) |  |  | 6.24 |  |  |  | - |  |  |  | - |
Outstanding December 31, 2019 |  |  | 142,000 |  |  |  | 18.26 |  |  |  | 5.14 |  |  |  | - |
Cancelled |  |  | (115,000 | ) |  |  | 17.55 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (1,000 | ) |  |  | 8.09 |  |  |  | - |  |  |  | - |
Outstanding December 31, 2020 |  |  | 26,000 |  |  | $ | 21.76 |  |  |  | 4.56 |  |  | $ | - |
Options vested and exercisable at December 31, 2020 |  |  | 26,000 |  |  | $ | 21.76 |  |  |  | 4.56 |  |  | $ | - |
Summary of Restricted Stock Unit Activity | The following table summarizes restricted stock unit activity for the years ended December 31, 2020 and 2019:
|  | Outstanding Restricted Stock Units |  |  | Weighted Average Fair Value per Share |
January 1, 2019 |  |  | 61,000 |  |  | $ | 4.94 |
Granted |  |  | 77,000 |  |  |  | 3.35 |
Released |  |  | (38,000 | ) |  |  | 4.09 |
Canceled |  |  | (43,000 | ) |  |  | 4.17 |
December 31, 2019 |  |  | 57,000 |  |  | $ | 3.57 |
Granted |  |  | 172,000 |  |  |  | 2.51 |
Released |  |  | (58,000 | ) |  |  | 3.05 |
Cancelled |  |  | (80,000 | ) |  |  | 2.65 |
December 31, 2020 |  |  | 91,000 |  |  | $ | 2.71 |
Balance expected to vest at December 31, 2020 |  |  | 78,000 |  |  |  |  |

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