Note 9 - Accounting for Share-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
Dec. 01, 2018	Dec. 02, 2017	Dec. 03, 2016
Outstanding Options (in shares)	3,860,764	2,986,481	2,912,073
Outstanding Options, weighted-average exercise price (in dollars per share)	$ 42.28	$ 34.92	$ 30.37
Granted (in shares)	818,537	1,493,133	853,516
Granted, weighted-average exercise price (in dollars per share)	$ 53.06	$ 53.97	$ 33.98
Exercised (in shares)	(198,849)	(514,064)	(593,891)
Exercised, weighted-average exercise price (in dollars per share)	$ 31.37	$ 34.51	$ 24.38
Forfeited or cancelled (in shares)	(14,346)	(104,786)	(185,217)
Forfeited or cancelled, weighted-average exercise price (in dollars per share)	$ 48.62	$ 37.20	$ 39.91
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

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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