Note 13 - Capital Stock and Stock Compensation - Restricted Stock Awards (Details) - $ / shares	12 Months Ended
	Nov. 25, 2017	Nov. 26, 2016
Restricted Shares Outstanding (in shares)	99,138
Granted (in dollars per share)
Remaining Restriction Period (Year)
Restricted Stock [Member]
Restricted Shares Outstanding (in shares)	99,138	123,014
Granted (in dollars per share)	$ 28.70
Restricted Stock [Member] | July 17, 2013 [Member]
Restricted Shares Outstanding (in shares)	12,600
Granted (in dollars per share)	$ 16.64
Remaining Restriction Period (Year)	219 days
Restricted Stock [Member] | January 14, 2015 [Member]
Restricted Shares Outstanding (in shares)	40,000
Granted (in dollars per share)	$ 20.21
Remaining Restriction Period (Year)	36 days
Restricted Stock [Member] | July 14, 2015 [Member]
Restricted Shares Outstanding (in shares)	2,000
Granted (in dollars per share)	$ 38.02
Remaining Restriction Period (Year)	219 days
Restricted Stock [Member] | July 12, 2016 [Member]
Restricted Shares Outstanding (in shares)	2,000
Granted (in dollars per share)	$ 25.88
Remaining Restriction Period (Year)	219 days
Restricted Stock [Member] | January 10, 2017 [Member]
Restricted Shares Outstanding (in shares)	36,000
Granted (in dollars per share)	$ 29.05
Remaining Restriction Period (Year)	2 years 36 days
Restricted Stock [Member] | March 8, 2017 [Member]
Restricted Shares Outstanding (in shares)	6,538
Granted (in dollars per share)	$ 26.77
Remaining Restriction Period (Year)	109 days