Note 16 - Stock-based Compensation - Summary of Stock Option Activity (Details) - $ / shares |
6 Months Ended |
|---|---|
May 31, 2022 | |
| Outstanding, stock options (in shares) | 586,783 |
| Outstanding, weighted-average exercise price per stock option (in dollars per share) | |
| Exercised, stock options (in shares) | (250,250) |
| Exercised, weighted-average exercise price per share (in dollars per share) | $ 1.82 |
| Forfeited, stock options (in shares) | (16,000) |
| Forfeited, weighted-average exercise price per share (in dollars per share) | $ 14.77 |
| Outstanding, stock options (in shares) | 320,533 |
| Outstanding, weighted-average exercise price per stock option (in dollars per share) | $ 4.22 |
| Exercisable, stock options (in shares) | 274,534 |
| Exercisable, weighted-average exercise price per share (in dollars per share) | $ 1.90 |
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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