Consolidated Statements of Operations - USD ($)	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Sales	$ 20,715,080	$ 21,557,649
Cost of goods sold	16,632,979	16,237,766
Gross profit	4,082,101	5,319,883
Expenses:
Engineering	501,182	429,910
Selling	1,889,461	1,838,971
General and administrative	3,343,500	3,437,591
Impairment of assets	70,000	44,858
Total expenses	5,804,143	5,751,330
(Loss) from operations	(1,722,042)	(431,447)
Other income (expense):
Interest expense	(319,622)	(248,580)
Other	248,507	157,244
Total other income (expense)	(71,115)	(91,336)
Income	(1,793,157)	(522,783)
Income tax (benefit)	(423,798)	(96,601)
(Loss) from continuing operations	(1,369,359)	(426,182)
Discontinued Operations
Loss from operations of discontinued segment	(400,739)	(617,425)
Income tax benefit	(133,017)	(222,273)
Loss on discontinued operations	(267,722)	(395,152)
Net (Loss)	$ (1,637,081)	$ (821,334)
(Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.33)	$ (0.10)
Discontinued Operations (in dollars per share)	(0.06)	(0.10)
Net Income (Loss) per share (in dollars per share)	(0.39)	(0.20)
(Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.33)	(0.10)
Discontinued Operations (in dollars per share)	(0.06)	(0.10)
Net Income (Loss) per share (in dollars per share)	$ (0.39)	$ (0.20)
Weighted average outstanding shares used to compute basic net loss per share (in shares)	4,151,406	4,097,748
Weighted average outstanding shares used to compute diluted net loss per share (in shares)	4,151,406	4,097,748