Note 4 - Line Of Credit And Long-term Debt (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Nov. 30, 2012
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 5
Debt Instrument, Basis Spread on Variable Rate (in Basis Points)	0.50%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	5.00%
Line of Credit Facility, Interest Rate at Period End	5.00%
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)	5
Debt Instrument, Face Amount (in Dollars)		$ 2.5
Accounts Receivable [Member]
Maximum Draws Allowed	75.00%
Eligible Inventories [Member]
Maximum Draws Allowed	50.00%