Note 5 - Accrued Expenses (Details) - Major Components Of Accrued Expenses (USD $)	May 31, 2013	Nov. 30, 2012
Major Components Of Accrued Expenses [Abstract]
Salaries, wages, and commissions	$ 1,043,989	$ 924,123
Accrued warranty expense	526,981	578,864
Other	388,990	457,253
	$ 1,959,960	$ 1,960,240