Note 13 - Changes in Outstanding Options (Details)	12 Months Ended
	Nov. 28, 2015 $ / shares shares
Outstanding (in shares) | shares	437,250
Outstanding (in dollars per share) | $ / shares	$ 11.94
Exercised (in shares) | shares	(351,000)
Exercised (in dollars per share) | $ / shares	$ 12.09
Forfeited/Expired (in shares) | shares	(2,000)
Forfeited/Expired (in dollars per share) | $ / shares	$ 8.02
Outstanding (in shares) | shares	84,250
Outstanding (in dollars per share) | $ / shares	$ 11.42
Exercisable (in shares) | shares	84,250
Exercisable (in dollars per share) | $ / shares	$ 11.42