Note 9 - Accounting for Share-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
Nov. 30, 2019	Dec. 01, 2018	Dec. 02, 2017
Outstanding Options (in shares)	4,466,106	3,860,764	2,986,481
Outstanding Options, weighted-average exercise price (in dollars per share)	$ 44.72	$ 42.28	$ 34.92
Granted (in shares)	1,020,246	818,537	1,493,133
Granted, weighted-average exercise price (in dollars per share)	$ 45.53	$ 53.06	$ 53.97
Exercised (in shares)	(378,734)	(198,849)	(514,064)
Exercised, weighted-average exercise price (in dollars per share)	$ 28.74	$ 31.37	$ 34.51
Forfeited or cancelled (in shares)	(47,308)	(14,346)	(104,786)
Forfeited or cancelled, weighted-average exercise price (in dollars per share)	$ 48.90	$ 48.62	$ 37.20
Outstanding Options (in shares)	5,060,310	4,466,106	3,860,764
Outstanding Options, weighted-average exercise price (in dollars per share)	$ 46.04	$ 44.72	$ 42.28

For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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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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