Note 13 - Restricted Stock Awards (Details)	12 Months Ended
	Nov. 28, 2015 $ / shares shares
July 17, 2013 [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	37,800
(in dollars per share) | $ / shares	$ 16.64
	2 years 219 days
January 15, 2014 [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	48,000
(in dollars per share) | $ / shares	$ 14.12
	1 year 36 days
January 14, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	40,000
(in dollars per share) | $ / shares	$ 20.21
	2 years 36 days
April 1, 2015 [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	6,354
(in dollars per share) | $ / shares	$ 28.33
	109 days
July 14, 2015 [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,000
(in dollars per share) | $ / shares	$ 38.02
	2 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	134,154