Note 18 - Stock-based Compensation - Stock Option Valuation Assumptions (Details) - Restricted Stock Units (RSUs) [Member] |
9 Months Ended |
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Aug. 31, 2021
$ / shares
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| Risk free rate | 0.33% |
| Expected dividends | 0.00% |
| Minimum [Member] | |
| Expected volatility | 83.00% |
| Expected life (in years) (Year) | 4 years |
| Market price of the Company’s common stock on date of grant (in dollars per share) | $ 14.74 |
| Exercise price (in dollars per share) | $ 14.90 |
| Maximum [Member] | |
| Expected volatility | 113.00% |
| Expected life (in years) (Year) | 5 years |
| Market price of the Company’s common stock on date of grant (in dollars per share) | $ 19.70 |
| Exercise price (in dollars per share) | $ 17.00 |
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- Definition Represents the market price of the Company's common stock on date of grant. No definition available.
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. No definition available.
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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 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://fasb.org/us-gaap/role/ref/legacyRef
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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 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://fasb.org/us-gaap/role/ref/legacyRef
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