Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013 acre	Dec. 01, 2012 item sqft	Dec. 03, 2011	Nov. 27, 2010 acre sqft
Fiscal Year
Length of fiscal year	364 days	364 days	371 days
Cash and Cash Equivalents
Money market funds invested in U.S. Treasury obligations	$ 175	$ 175
Impairment of Investments in Long Lived Assets
Impairment losses	0	0	0
Income Taxes
Accrual for uncertain income tax positions	$ 0
Risks and uncertainties
Area of leased building acquired (in square feet)				120,000
Area of land acquired (in acres)	49			51
Number of buildings built		2
Area of the lehigh valley land on which building is constructed (in acres)		228,000
Minimum
Fiscal Year
Length of fiscal year	364 days
Maximum
Fiscal Year
Length of fiscal year	371 days