Note 8 - Accrued Expenses - Major Components Of Accrued Expenses (Details) - USD ($)	Nov. 30, 2017	Nov. 30, 2016
Salaries, wages, and commissions	$ 584,768	$ 542,449
Accrued warranty expense	68,451	134,373
Other	328,339	342,234
Total accrued liabilities, current	$ 981,558	$ 1,019,056