Equity Incentive Plan (Details 1) - Stock Option [Member] - $ / shares |
3 Months Ended | |
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Mar. 31, 2022 |
Mar. 31, 2021 |
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| Grant date fair value | $ 1.57 | $ 4.86 |
| Risk-free interest rate | 1.39% | 0.90% |
| Dividend yield | 0.00% | 0.00% |
| Expected life in years | 5.3 | 5.5 |
| Expected volatility | 122.00% | 121.00% |
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of terms of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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