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Note 11 - Share-based Compensation - Summary of Stock Options Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Feb. 28, 2021	Feb. 28, 2021
Balance (in shares)	10,403
Weighted average exercise price outstanding, balance (in dollars per share)	$ 4.59
Granted (in shares)	1,218
Granted, weighted average exercise price (in dollars per share)	$ 9.96
Exercised (in shares)	(557)
Exercised, weighted average exercise price (in dollars per share)	$ 3.90
Balance (in shares)	10,403	11,064
Weighted average exercise price outstanding, balance (in dollars per share)	$ 4.59	$ 5.23
Outstanding, weighted-average remaining contractual term (Year)	2 years 5 months 4 days
Outstanding, aggregate intrinsic value		$ 36,884
Vested and exercisable (in shares)	7,620
Vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 4.31
Vested and exercisable, weighted-average remaining contractual term (Year)	1 year 9 months 18 days
Vested and exercisable, aggregate intrinsic value		$ 30,818

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.

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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.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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