Export Sales (Details) - USD ($)	12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	$ 4,250,717	$ 3,748,226
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	4,838,884	4,688,335
Other Asian Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	1,690,734	2,160,762
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	407,894	411,376
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Export sales	$ 1,012,220	$ 1,185,304