Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Sales	$ 4,689,354	$ 5,297,970	$ 9,110,522	$ 11,010,651
Cost of goods sold	3,877,870	3,814,009	7,185,215	7,898,807
Gross profit	811,484	1,483,961	1,925,307	3,111,844
Expenses:
Engineering	132,347	91,725	264,987	191,141
Selling	483,060	431,925	968,441	896,838
General and administrative	917,461	896,746	1,765,695	1,739,327
Total expenses	1,532,868	1,420,396	2,999,123	2,827,306
Income (Loss) from operations	(721,384)	63,565	(1,073,816)	284,538
Other income (expense):
Interest expense	(79,253)	(54,134)	(143,047)	(121,973)
Other	63,245	20,104	114,920	62,297
Total other income (expense)	(16,008)	(34,030)	(28,127)	(59,676)
Income (Loss) from continuing operations before income taxes	(737,392)	29,535	(1,101,943)	224,862
Income tax expense (benefit)	(228,485)	12,610	(339,396)	74,377
Income (Loss) from continuing operations	(508,907)	16,925	(762,547)	150,485
Discontinued Operations
Income (loss) from operations of discontinued segment	(27,665)	(104,994)	(22,789)	(180,119)
Income tax expense (benefit)	(9,012)	(31,498)	(7,748)	(54,035)
Income (Loss) on discontinued operations	(18,653)	(73,496)	(15,041)	(126,084)
Net Income (Loss)	$ (527,560)	$ (56,571)	$ (777,588)	$ 24,401
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.12)	$ 0	$ (0.18)	$ 0.04
Discontinued Operations (in dollars per share)	0	(0.02)	0	(0.03)
Net Income (Loss) per share (in dollars per share)	(0.12)	(0.02)	(0.18)	0.01
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.12)	0	(0.18)	0.04
Discontinued Operations (in dollars per share)	0	(0.02)	0	(0.03)
Net Income (Loss) per share (in dollars per share)	$ (0.12)	$ (0.02)	$ (0.18)	$ 0.01
Weighted average outstanding shares used to compute basic net income per share (in shares)	4,158,969	4,101,810	4,142,672	4,088,073
Weighted average outstanding shares used to compute diluted net income per share (in shares)	4,158,969	4,101,810	4,142,672	4,088,073