Note 8 - Accounting for Share-based Compensation - Stock Option Activity (Details)	9 Months Ended
	Sep. 01, 2018 $ / shares shares
Outstanding Options (in shares) | shares	3,860,764
Outstanding Options, average exercise price (in dollars per share) | $ / shares	$ 42.28
Granted (in shares) | shares	810,306
Granted, average exercise price (in dollars per share) | $ / shares	$ 53.07
Exercised (in shares) | shares	(163,190)
Exercised, average exercise price (in dollars per share) | $ / shares	$ 30.86
Forfeited or cancelled (in shares) | shares	(6,281)
Forfeited or cancelled, average exercise price (in dollars per share) | $ / shares	$ 44
Outstanding Options (in shares) | shares	4,501,599
Outstanding Options, average exercise price (in dollars per share) | $ / shares	$ 44.64