Note 6 - Accrued Expenses - Major Components Of Accrued Expenses (Details) - USD ($)	Feb. 28, 2017	Nov. 30, 2016
Salaries, wages, and commissions	$ 454,506	$ 542,449
Accrued warranty expense	125,672	134,373
Other	272,229	342,234
Total accrued liabilities, current	$ 852,407	$ 1,019,056