Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Sales	$ 6,431,217	$ 6,514,327	$ 17,441,869	$ 20,604,932
Cost of goods sold	5,189,532	5,252,241	13,088,340	15,188,639
Gross profit	1,241,685	1,262,086	4,353,529	5,416,293
Expenses:
Engineering	123,653	127,889	314,794	330,650
Selling	456,037	508,001	1,352,875	1,604,804
General and administrative	879,160	906,275	2,618,488	2,951,293
Impairment of goodwill		618,729		618,729
Total expenses	1,458,850	2,160,894	4,286,157	5,505,476
Income (Loss) from operations	(217,165)	(898,808)	67,372	(89,183)
Other income (expense):
Interest expense	(60,537)	(78,726)	(182,510)	(225,776)
Other	53,884	(94,444)	116,181	(80,180)
Total other income (expense)	(6,653)	(173,170)	(66,329)	(305,956)
Income (Loss) from continuing operations before income taxes	(223,818)	(1,071,978)	1,043	(395,139)
Income tax expense (benefit)	(74,142)	(355,570)	236	(133,171)
Income (Loss) from continuing operations	(149,676)	(716,408)	807	(261,968)
Discontinued Operations
Loss from operations of discontinued segment	(207,203)	(113,122)	(387,321)	(191,146)
Income tax benefit	(68,600)	(33,937)	(122,636)	(57,344)
Loss on discontinued operations	(138,603)	(79,185)	(264,685)	(133,802)
Net Income (Loss)	$ (288,279)	$ (795,593)	$ (263,878)	$ (395,770)
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.04)	$ (0.18)	$ 0	$ (0.06)
Discontinued Operations (in dollars per share)	(0.03)	(0.02)	(0.06)	(0.03)
Net Income (Loss) per share (in dollars per share)	(0.07)	(0.20)	(0.06)	(0.10)
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.04)	(0.18)	0	(0.06)
Discontinued Operations (in dollars per share)	(0.03)	(0.02)	(0.06)	(0.03)
Net Income (Loss) per share (in dollars per share)	$ (0.07)	$ (0.20)	$ (0.06)	$ (0.10)
Weighted average outstanding shares used to compute basic net income per share (in shares)	4,105,704	4,061,052	4,093,993	4,057,496
Weighted average outstanding shares used to compute diluted net income per share (in shares)	4,105,704	4,061,052	4,093,993	4,057,496