Note 13 - Additional Information Regarding Outstanding Stock Options (Details) $ in Thousands	12 Months Ended
	Nov. 28, 2015 USD ($) $ / shares shares
Range of $3.23 - $6.45 [Member]
Lower Range of Exercise Prices (in dollars per share)	$ 3.23
Upper Range of Exercise Prices (in dollars per share)	$ 6.45
Options Outstanding Shares (in shares) | shares	1,000
Options Outstanding Weighted Average Remaining Contractual Life	4 years 219 days
Weighted Average Exercise Price (in dollars per share)	$ 4.38
Options Exercisable Shares (in shares) | shares	1,000
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 4.38
Range of $6.45 - $9.67 [Member]
Lower Range of Exercise Prices (in dollars per share)	6.45
Upper Range of Exercise Prices (in dollars per share)	$ 9.67
Options Outstanding Shares (in shares) | shares	22,750
Options Outstanding Weighted Average Remaining Contractual Life	5 years 219 days
Weighted Average Exercise Price (in dollars per share)	$ 8.02
Options Exercisable Shares (in shares) | shares	22,750
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 8.02
Range of $9.68 - $12.90 [Member]
Lower Range of Exercise Prices (in dollars per share)	9.68
Upper Range of Exercise Prices (in dollars per share)	$ 12.90
Options Outstanding Shares (in shares) | shares	28,000
Options Outstanding Weighted Average Remaining Contractual Life	1 year 328 days
Weighted Average Exercise Price (in dollars per share)	$ 10.60
Options Exercisable Shares (in shares) | shares	28,000
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 10.60
Range of $12.91 - $16.13 [Member]
Lower Range of Exercise Prices (in dollars per share)	12.91
Upper Range of Exercise Prices (in dollars per share)	$ 16.13
Options Outstanding Shares (in shares) | shares	32,500
Options Outstanding Weighted Average Remaining Contractual Life	1 year 146 days
Weighted Average Exercise Price (in dollars per share)	$ 14.73
Options Exercisable Shares (in shares) | shares	32,500
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 14.73
Options Outstanding Shares (in shares) | shares	84,250
Options Exercisable Shares (in shares) | shares	84,250
Aggregate Intrinsic Value | $	$ 1,714
Aggregate Intrinsic Value | $	$ 1,714