Note 6 - Accrued Expenses - Major Components Of Accrued Expenses (Details) - USD ($)	Aug. 31, 2017	Nov. 30, 2016
Salaries, wages, and commissions	$ 518,162	$ 542,449
Accrued warranty expense	133,194	134,373
Other	382,338	342,234
Total accrued liabilities, current	$ 1,033,694	$ 1,019,056