Consolidated Statements of Operations - USD ($)	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Sales	$ 24,965,086	$ 22,409,123
Cost of goods sold	18,368,596	20,009,523
Gross profit	6,596,490	2,399,600
Expenses:
Engineering	505,085	476,721
Selling	2,014,149	1,623,960
General and administrative	3,553,848	4,208,553
Total expenses	6,073,082	6,309,234
Income (Loss) from operations	523,408	(3,909,634)
Other income (expense):
Interest expense	(313,485)	(304,611)
Other	56,967	1,254,289
Total other income (expense)	(256,518)	949,678
Income (Loss) before income taxes	266,890	(2,959,956)
Income tax expense (benefit)	54,259	(856,470)
Net Income (Loss)	$ 212,631	$ (2,103,486)
Net Income (Loss) per share
Basic Net Income (Loss) per share (in dollars per share)	$ 0.05	$ (0.48)
Diluted Net Income (Loss) per share (in dollars per share)	$ 0.05	$ (0.48)
Weighted average outstanding shares used to compute basic net loss per share (in shares)	4,515,229	4,393,887
Weighted average outstanding shares used to compute diluted net loss per share (in shares)	4,515,229	4,393,887