Note Receivable - Additional Information (Detail) (USD $)		3 Months Ended
	Feb. 28, 2014	Nov. 30, 2012 Hemet California [Member] Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of idle facilities sold		2
Down payment received for sale of idle property, plant and equipment		$ 500,000
Note receivable from sale of idle property, plant and equipment		1,700,000
Cash received for facilities sold		348,000
Facilities collateral for note		2
Selling expenses paid for sale of idle property, plant and equipment		152,000
Note receivable interest rate		6.00%
Note receivable interest amortization period		20 years
Note receivable final payment period		6 years
Note receivables less principal payments received	$ 1,643,000