Export Sales (Details) - USD ($)	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	$ 4,233,319	$ 4,250,717
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	5,828,541	4,838,884
Other Asian Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	2,109,843	1,690,734
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	527,183	407,894
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	$ 1,390,715	$ 1,012,220