Note 13 - Changes in Non-vested Options (Details)	12 Months Ended
	Nov. 28, 2015 $ / shares shares
Restricted Stock [Member]
Non-vested options outstanding (in shares) | shares	123,737
Non-vested options outstanding (in dollars per share) | $ / shares	$ 15.28
Granted (in shares) | shares	54,354
Granted (in dollars per share) | $ / shares	$ 21.81
Vested (in shares) | shares	(26,337)
Vested (in dollars per share) | $ / shares	$ 15.42
Forfeited/Expired (in shares) | shares	(17,600)
Forfeited/Expired (in dollars per share) | $ / shares	$ 17
Non-vested options outstanding (in shares) | shares	134,154
Non-vested options outstanding (in dollars per share) | $ / shares	$ 17.68
Vested (in shares) | shares	(26,337)
Vested (in dollars per share) | $ / shares	$ 15.42
Non-vested options outstanding (in shares) | shares	22,750
Non-vested options outstanding (in dollars per share) | $ / shares	$ 8.04
Granted (in shares) | shares
Granted (in dollars per share) | $ / shares
Vested (in shares) | shares	(20,750)
Vested (in dollars per share) | $ / shares	$ 8.05
Forfeited/Expired (in shares) | shares	(2,000)
Forfeited/Expired (in dollars per share) | $ / shares	$ 8.02
Non-vested options outstanding (in shares) | shares
Non-vested options outstanding (in dollars per share) | $ / shares
Vested (in shares) | shares	(20,750)
Vested (in dollars per share) | $ / shares	$ 8.05