Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Sales	$ 5,445,732	$ 5,747,256	$ 10,471,656	$ 9,871,482
Cost of goods sold	4,451,016	4,788,261	8,499,779	8,307,644
Gross profit	994,716	958,995	1,971,877	1,563,838
Expenses:
Engineering	122,593	116,773	232,445	263,986
Selling	401,224	397,270	856,908	740,617
General and administrative	1,395,515	814,465	2,276,837	1,651,371
Total expenses	1,919,332	1,328,508	3,366,190	2,655,974
Income (Loss) from operations	(924,616)	(369,513)	(1,394,313)	(1,092,136)
Other income (expense):
Interest expense	(77,246)	(100,402)	(160,520)	(185,441)
Other	4,698	11,092	13,897	37,915
Total other income (expense)	(72,548)	(89,310)	(146,623)	(147,526)
Income (Loss) before income taxes	(997,164)	(458,823)	(1,540,936)	(1,239,662)
Income tax expense (benefit)	(195,444)	(102,781)	(302,023)	(277,688)
Net Income (Loss)	$ (801,720)	$ (356,042)	$ (1,238,913)	$ (961,974)
Net Income (Loss) per share
Basic Net Income (Loss) per share (in dollars per share)	$ (0.18)	$ (0.08)	$ (0.28)	$ (0.23)
Diluted Net Income (Loss) per share (in dollars per share)	$ (0.18)	$ (0.08)	$ (0.28)	$ (0.23)
Weighted average outstanding shares used to compute basic net income per share (in shares)	4,401,754	4,299,289	4,358,982	4,272,532
Weighted average outstanding shares used to compute diluted net income per share (in shares)	4,401,754	4,299,289	4,358,982	4,272,532