Note 6 - Accrued Expenses - Major Components Of Accrued Expenses (Details) - USD ($)	May 31, 2017	Nov. 30, 2016
Salaries, wages, and commissions	$ 584,568	$ 542,449
Accrued warranty expense	152,964	134,373
Other	270,681	342,234
Total accrued liabilities, current	$ 1,008,213	$ 1,019,056