Consolidated Statements of Operations - USD ($)	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Sales	$ 21,557,649	$ 26,326,150
Cost of goods sold	16,237,766	19,414,382
Gross profit	5,319,883	6,911,768
Expenses:
Engineering	429,910	433,290
Selling	1,838,971	2,052,495
General and administrative	3,437,591	3,884,066
Impairment of assets	44,858	618,729
Total expenses	5,751,330	6,988,580
(Loss) from operations	(431,447)	(76,812)
Other income (expense):
Interest expense	(248,580)	(302,281)
Other	157,244	(131,407)
Total other income (expense)	(91,336)	(433,688)
Income	(522,783)	(510,500)
Income tax (benefit)	(96,601)	(200,851)
(Loss) from continuing operations	(426,182)	(309,649)
Loss from operations of discontinued segment	(617,425)	(354,562)
Income tax benefit	(222,273)	(106,369)
Loss on discontinued operations	(395,152)	(248,193)
Net (Loss)	$ (821,334)	$ (557,842)
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.10)	$ (0.08)
Discontinued Operations (in dollars per share)	(0.10)	(0.06)
Net Income (Loss) per share (in dollars per share)	(0.20)	(0.14)
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.10)	(0.08)
Discontinued Operations (in dollars per share)	(0.10)	(0.06)
Net Income (Loss) per share (in dollars per share)	$ (0.20)	$ (0.14)
Weighted average outstanding shares used to compute basic net loss per share (in shares)	4,097,748	4,058,382
Weighted average outstanding shares used to compute diluted net loss per share (in shares)	4,097,748	4,058,382