Schedule II-Valuation and Qualifying Accounts and Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010
Uncollectible accounts - trade
Reserves:
Balance at Beginning of Year	$ 131	$ 148	$ 187
Charged to Cost and Expenses	26	1	(22)
Charged to Other Accounts	21	13	24
Deductions From Reserves	50	31	41
Balance at End of Year	128	131	148
Inventories
Reserves:
Balance at Beginning of Year	1,242	582	781
Charged to Cost and Expenses	380	1,187	284
Charged to Other Accounts	55	354	(11)
Deductions From Reserves	1,245	881	472
Balance at End of Year	432	1,242	582
Valuation allowance on deferred tax assets
Reserves:
Balance at Beginning of Year	446	469	419
Charged to Cost and Expenses	44	(23)	50
Balance at End of Year	$ 490	$ 446	$ 469