Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Sales	$ 6,432,296	$ 5,875,700	$ 17,909,941	$ 18,329,363
Cost of goods sold	4,666,131	4,175,575	12,587,490	13,248,961
Gross profit	1,766,165	1,700,125	5,322,451	5,080,402
Expenses
Engineering	87,339	78,949	256,684	346,373
Selling	350,771	380,797	1,136,650	1,241,187
General and administrative	983,326	1,086,685	3,071,249	3,550,460
Total expenses	1,421,436	1,546,431	4,464,583	5,138,020
Income (loss) from operations	344,729	153,694	857,868	(57,618)
Other income (expense):
Interest expense	(83,668)	(150,012)	(259,022)	(471,784)
Other	60,196	(4,165)	1,527,881	(13,386)
Total other income (expense)	(23,472)	(154,177)	1,268,859	(485,170)
Income (loss) from continuing operations before income taxes	321,257	(483)	2,126,727	(542,788)
Income tax expense (benefit)	67,147	(2,713)	446,304	(116,131)
Income (loss) from continuing operations	254,110	2,230	1,680,423	(426,657)
Discontinued Operations (Note 3)
Loss from discontinued operations before income taxes	0	(35,919)	0	(123,849)
Income tax benefit	0	(7,489)	0	(25,954)
Loss on discontinued operations	0	(28,430)	0	(97,895)
Net income (loss)	$ 254,110	$ (26,200)	$ 1,680,423	$ (524,552)