Stock-based Compensation, Weighted-Average Assumptions Used in Black-Scholes Option-pricing Model (Details) - 2020 Plan Evergreen Provision [Member] - USD ($) |
3 Months Ended | |
---|---|---|
Mar. 31, 2023 |
Mar. 31, 2022 |
|
Weighted-average Assumptions Used in Black-Scholes Option-pricing Model [Abstract] | ||
Expected stock price volatility | 95.40% | 99.60% |
Expected life of options | 6 years 1 month 6 days | 6 years |
Expected dividend yield | 0.00% | 0.00% |
Risk free interest rate | 3.70% | 1.70% |
Share-based Compensation Arrangement by Share-based Payment Award [Abstract] | ||
Stock options vested (in shares) | 246,068 | 62,698 |
Weighted average fair value per share of options vesting (in dollars per share) | $ 2.44 | $ 2.9 |
Stock option exercised (in shares) | 0 | 24,309 |
Aggregate intrinsic value | $ 0 | $ 59,000 |
Stock options forfeited (in shares) | 0 | 8,288 |
X | ||||||||||
- References No definition available.
|
X | ||||||||||
- References No definition available.
|
X | ||||||||||
- 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://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Definition The estimated measure of the 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Number of non-vested options forfeited. No definition available.
|
X | ||||||||||
- Definition Number of options vested. No definition available.
|
X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. No definition available.
|
X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Details
|