Note 5 - Accrued Expenses (Detail) - Major Components Of Accrued Expenses (USD $)	Feb. 28, 2013	Nov. 30, 2012
Salaries, wages, and commissions	$ 797,124	$ 924,123
Accrued warranty expense	575,330	578,864
Other	362,031	457,253
	$ 1,734,485	$ 1,960,240

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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