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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Stockholders' Equity Note [Abstract] |
Schedule of Stock Option Activity | The following is a summary of stock option activity:
| Number of shares |  | Weighted average exercise price
Options outstanding as of December 31, 2021: | 354,609 |  |  | $ | 2.52 |
Granted | 108,891 |  |  | 1.97 |
Exercised | — |  |  | — |
Canceled and forfeited | — |  |  | — |
Expired | (63,500) |  |  | 2.75 |
Options outstanding as of December 31, 2022: | 400,000 |  |  | $ | 2.33 |
Schedue of Shares Authorized under Stock Option Plans, by Exercise Price Range | The following table summarizes information about options outstanding as of December 31, 2022:
|  | Options Outstanding |  | Options Exercisable
Range of exercise prices |  | Number outstanding as of December 31, 2022 |  | Weighted average remaining contractual life |  | Weighted average exercise price |  | Number exercisable as of December 31, 2022 |  | Weighted average exercise price
$1.86 - $1.86 |  | 52,745 |  |  | 5.69 |  | $ | 1.86 |  |  | — |  |  | $ | — |
2.00 - 2.00 |  | 234,000 |  |  | 3.85 |  | 2.00 |  |  | 234,000 |  |  | 2.00 |
2.07- 6.05 |  | 113,255 |  |  | 3.52 |  | 3.25 |  |  | 55,016 |  |  | 4.42 |
$1.86 - $6.05 |  | 400,000 |  |  | 4.00 |  | $ | 2.33 |  |  | 289,016 |  |  | $ | 2.46 |
Schedule of Stock Options Outstanding, Vested and Expected to Vest | Options outstanding that have vested and are expected to vest as of December 31, 2022 are as follows:
| Number of shares |  | Weighted average exercise price |  | Weighted average remaining contractual term |  | Aggregate intrinsic value
Vested | 289,016 |  |  | $ | 2.46 |  |  | 3.44 |  | $ | — |
Expected to vest | 99,081 |  |  | 2.01 |  |  | 5.44 |  | — |
Total | 388,097 |  |  | $ | 2.35 |  |  | 3.95 |  | $ | — |
Schedule of Restricted Stock Units Activity | The following is a summary of restricted stock activity:
| Number of shares |  | Weighted average grant date fair value
Unvested at December 31, 2021: | 3,316,035 |  |  | $ | 3.69 |
Granted | 2,289,418 |  |  | 2.58 |
Vested | (1,574,430) |  |  | 3.51 |
Canceled | (655,269) |  |  | 3.59 |
Unvested at December 31, 2022: | 3,375,754 |  |  | $ | 2.99 |
Expected to vest after December 31, 2022 | 3,122,812 |  |  | $ | 3.01 |
Stock-Based Compensation, Valuation Assumptions | The fair value of stock-based compensation was determined using the Black-Scholes option pricing model and the following weighted average assumptions:
| Year Ended December 31,
| 2022 |  | 2021 |  |
Stock Option Plans: |  |  |  |  |
Risk free interest rate | 3.08 | % |  | 0 | % |  |
Expected dividend yield | 0 | % |  | 0 | % |  |
Expected term (in years) | 5.00 |  | 0.00 |  |
Volatility | 71 | % |  | 0 | % |  |
Employee Stock Purchase Plan: |  |  |  |  |
Risk free interest rate | 2.30 | % |  | 0.12 | % |  |
Expected dividend yield | 0 | % |  | 0 | % |  |
Expected term (in years) | 1.33 |  | 1.17 |  |
Volatility | 104 | % |  | 75 | % |  |

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