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Stock Options and Stock Grants (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
We follow ASC Topic 718, Share-Based Payments, in which compensation expense is recognized only for share-based payments expected to vest. | We follow ASC Topic 718, Share-Based Payments, in which compensation expense is recognized only for share-based payments expected to vest.
|  | Years ended December 31, |
|  | 2021 |  |  | 2020 |
Share-based compensation expense |  | $ | 160 |  |  | $ | 195 |
Remaining unrecognized compensation expense |  | $ | 1,581 |  |  |  |  |
Remaining weighted average-period, expense recognition (years) |  |  | 2.9 |  |  |  |  |
Schedule of assumptions used to calculate Black-Scholes option pricing model for options granted | The following table illustrates the various assumptions used to calculate the Black-Scholes option pricing model for options granted for all years presented: Schedule of assumptions used to calculate Black-Scholes option pricing model for options granted
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
Weighted-average risk-free interest rates: |  |  | 1.4 | % |  |  | 0.5 | %
Dividend yield: |  |  | 0 | % |  |  | 0 | %
Weighted-average expected life (years) of the option: |  |  | 5 |  |  |  | 5 |
Weighted-average expected stock price volatility: |  |  | 115 | % |  |  | 95 | %
Weighted-average fair value of the options granted: |  | $ | 2.59 |  |  | $ | 0.28 |
Additional disclosures for options granted for all years presented: | Additional disclosures for options granted for all years presented:
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
Vesting period (years) of shares granted in period |  |  | 3 |  |  |  | 3 |
Contractual life (years) of shares granted in period |  |  | 7 |  |  |  | 7 |
Estimated forfeitures |  |  | 4 | % |  |  | 4 | %
Schedule of option activity | The following table summarizes the option activity for our employees and directors during the year ended December 31, 2021: Schedule of option activity
Options |  | Shares (Rounded) |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value (000s) |
Outstanding on January 1, 2021 |  |  | 3,412,686 |  |  | $ | 0.57 |  |  |  | — |  |  |  | — |
Granted |  |  | 567,500 |  |  | $ | 4.14 |  |  |  | — |  |  |  | — |
Exercised |  |  | (535,100 | ) |  | $ | 0.44 |  |  |  | — |  |  |  | — |
Forfeited or expired |  |  | (251,870 | ) |  | $ | 1.09 |  |  |  | — |  |  |  | — |
Outstanding on December 31, 2021 |  |  | 3,193,216 |  |  | $ | 1.18 |  |  |  | 5.1 |  |  | $ | 10,267 |
Exercisable on December 31, 2021 |  |  | 2,189,378 |  |  | $ | 0.56 |  |  |  | 4.4 |  |  | $ | 8,405 |
Shares available for grant |  |  | 1,887,500 |  |  |  |  |  |  |  |  |  |  |  |  |
The aggregate intrinsic value in the table above is based on our closing stock price of $4.40 on the last business day for the year ended December 31, 2021. | The aggregate intrinsic value in the table above is based on our closing stock price of $4.40 on the last business day for the year ended December 31, 2021.
|  | Years ended December 31, |
|  | 2021 |  |  | 2020 |
Shares exercised |  |  | 535,100 |  |  |  | 84,500 |
Total intrinsic value |  | $ | 1,169 |  |  | $ | 10 |
Cash received |  | $ | 234 |  |  | $ | 37 |

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