Note 13 - Capital Stock and Stock Compensation - Changes in Outstanding Options (Details)	12 Months Ended
	Nov. 25, 2017 $ / shares shares
Outstanding, Shares (in shares) | shares	66,250
Outstanding, weighted average exercise price per share (in dollars per share) | $ / shares	$ 10.57
Exercised, Shares (in shares) | shares	(26,500)
Exercised, weighted average exercise price per share (in dollars per share) | $ / shares	$ 11.68
Forfeited/Expired, Shares (in shares) | shares	(28,000)
Forfeited/Expired, weighted average exercise price per share (in dollars per share) | $ / shares	$ 10.60
Outstanding, Shares (in shares) | shares	11,750
Outstanding, weighted average exercise price per share (in dollars per share) | $ / shares	$ 8.02
Exercisable, Shares (in shares) | shares	11,750
Exercisable, weighted average exercise price per share (in dollars per share) | $ / shares	$ 8.02