Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Sales	$ 5,280,269	$ 6,549,772	$ 15,940,268	$ 15,660,294
Cost of goods sold	4,105,012	5,104,826	12,504,621	12,290,041
Gross profit	1,175,257	1,444,946	3,435,647	3,370,253
Expenses:
Engineering	201,845	107,944	458,447	372,932
Selling	475,604	432,562	1,448,124	1,401,003
General and administrative	857,740	795,200	2,655,844	2,560,894
Impairment of asset held for lease	199,175		199,175
Total expenses	1,734,364	1,335,706	4,761,590	4,334,829
Income (Loss) from operations	(559,107)	109,240	(1,325,943)	(964,576)
Other income (expense):
Interest expense	(82,058)	(92,351)	(220,445)	(235,398)
Other	(307,735)	75,236	(487,850)	190,155
Total other income (expense)	(389,793)	(17,115)	(708,295)	(45,243)
Income (Loss) from continuing operations before income taxes	(948,900)	92,125	(2,034,238)	(1,009,819)
Income tax expense (benefit)	(182,184)	50,477	(86,145)	(288,919)
Income (Loss) from continuing operations	(766,716)	41,648	(1,948,093)	(720,900)
Discontinued Operations
Income (loss) from operations of discontinued segment		(26,449)	(67,177)	(49,238)
Income tax expense (benefit)		(8,008)	(16,324)	(15,756)
Income (Loss) on discontinued operations		(18,441)	(50,853)	(33,482)
Net Income (Loss)	$ (766,716)	$ 23,207	$ (1,998,946)	$ (754,382)
Net income (loss) per share - Basic:
Continuing operations (in dollars per share)	$ (0.18)	$ 0.01	$ (0.46)	$ (0.17)
Discontinued operations (in dollars per share)			(0.01)	(0.01)
Net Income (Loss) per share (in dollars per share)	(0.18)	0.01	(0.47)	(0.18)
Net income (loss) per share - Diluted:
Continuing operations (in dollars per share)	(0.18)	0.01	(0.46)	(0.17)
Discontinued operations (in dollars per share)			(0.01)	(0.01)
Net Income (Loss) per share (in dollars per share)	$ (0.18)	$ 0.01	$ (0.47)	$ (0.18)
Weighted average outstanding shares used to compute basic net income per share (in shares)	4,209,445	4,161,421	4,198,250	4,148,966
Weighted average outstanding shares used to compute diluted net income per share (in shares)	4,209,445	4,161,421	4,198,250	4,148,966