Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 03, 2011	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010
Property and Equipment
Property and Equipment, gross	$ 15,969	$ 16,155	$ 15,969
Accumulated depreciation	(13,721)	(14,030)	(13,721)
Property and Equipment, net	2,248	2,125	2,248
Depreciation expense		5,237	5,632	5,837
Gain on insurance recovery	371		571
Imperial hoop houses
Property and Equipment
Gain on insurance recovery			479
Land
Property and Equipment
Property and Equipment, gross	437	437	437
Land improvements
Property and Equipment
Property and Equipment, gross	1,561	1,561	1,561
Land improvements | Minimum
Property and Equipment
Estimated Useful Lives		10 years
Land improvements | Maximum
Property and Equipment
Estimated Useful Lives		20 years
Buildings and improvements
Property and Equipment
Property and Equipment, gross	1,842	1,857	1,842
Buildings and improvements | Minimum
Property and Equipment
Estimated Useful Lives		10 years
Buildings and improvements | Maximum
Property and Equipment
Estimated Useful Lives		40 years
Machinery and equipment
Property and Equipment
Property and Equipment, gross	12,129	12,300	12,129
Machinery and equipment | Minimum
Property and Equipment
Estimated Useful Lives		3 years
Machinery and equipment | Maximum
Property and Equipment
Estimated Useful Lives		20 years
Property and equipment
Property and Equipment
Depreciation expense		$ 362	$ 417	$ 508