Consolidated Statements of Operations - USD ($)	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Sales	$ 22,409,123	$ 22,889,173
Cost of goods sold	20,009,523	18,961,260
Gross profit	2,399,600	3,927,913
Expenses:
Engineering	476,721	479,345
Selling	1,623,960	1,602,006
General and administrative	4,208,553	3,343,443
Total expenses	6,309,234	5,424,794
(Loss) from operations	(3,909,634)	(1,496,881)
Other income (expense):
Interest expense	(304,611)	(358,174)
Other	1,254,289	86,235
Total other income (expense)	949,678	(271,939)
Income (loss) before income taxes	(2,959,956)	(1,768,820)
Income tax (benefit)	(856,470)	(349,234)
Net Income (Loss)	$ (2,103,486)	$ (1,419,586)
Net Income (Loss) per share
Basic Net Income (Loss) per share (in dollars per share)	$ (0.48)	$ (0.33)
Diluted Net Income (Loss) per share (in dollars per share)	$ (0.48)	$ (0.33)
Weighted average outstanding shares used to compute basic net loss per share (in shares)	4,393,887	4,277,375
Weighted average outstanding shares used to compute diluted net loss per share (in shares)	4,393,887	4,277,375