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Note 15 - Stock-based Compensation - Valuation Assumptions (Details) - $ / shares | 12 Months Ended
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Nov. 30, 2021 | Nov. 30, 2020
Share-based Payment Arrangement, Option [Member] |  |
Expected dividends |  |
Restricted Stock Units (RSUs) [Member] |  |
Risk free rate | 0.30% | 0.26%
Expected dividends | 0.00% | 0.00%
Expected volatility | 92.00% | 121.00%
Expected life (in years) (Year) | 3 years | 3 years
Exercise price (in dollars per share) | $ 0 | $ 0
Minimum [Member] | Share-based Payment Arrangement, Option [Member] |  |
Risk free rate | 0.26% | 0.00%
Expected volatility | 80.00% | 118.00%
Expected life (in years) (Year) | 4 years | 2 years
Market price of the Company’s common stock on date of grant (in dollars per share) | $ 14.74 | $ 1.90
Exercise price (in dollars per share) | 14.90 | 1.90
Minimum [Member] | Restricted Stock Units (RSUs) [Member] |  |
Market price of the Company’s common stock on date of grant (in dollars per share) | $ 20.9 | $ 14.10
Maximum [Member] | Share-based Payment Arrangement, Option [Member] |  |
Risk free rate | 0.64% | 1.68%
Expected volatility | 113.00% | 144.00%
Expected life (in years) (Year) | 5 years | 5 years
Market price of the Company’s common stock on date of grant (in dollars per share) | $ 20.94 | $ 14.80
Exercise price (in dollars per share) | 20.20 | 15.00
Maximum [Member] | Restricted Stock Units (RSUs) [Member] |  |
Market price of the Company’s common stock on date of grant (in dollars per share) | $ 26.9 | $ 15.80

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- Definition Represents the market price of the Company's common stock on date of grant. + References No definition available. + Details
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. + References No definition available. + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 + Details
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