Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Sales	$ 6,391,997	$ 7,289,129
Cost of goods sold	4,689,700	5,236,994
Gross profit	1,702,297	2,052,135
Expenses:
Engineering	116,174	115,679
Selling	483,795	564,714
General and administrative	953,102	1,042,593
Total expenses	1,553,071	1,722,986
Income from operations	149,226	329,149
Other income (expense):
Interest expense	(74,032)	(79,485)
Other	44,998	(4,864)
Total other income (expense)	(29,034)	(84,349)
Income before income taxes	120,192	244,800
Income tax expense	39,230	76,605
Net income	$ 80,962	$ 168,195
Net income per share:
Basic net income per share (in dollars per share)	$ 0.02	$ 0.04
Diluted net income per share (in dollars per share)	$ 0.02	$ 0.04
Weighted average outstanding shares used to compute basic net income per share (in shares)	4,074,338	4,050,507
Weighted average outstanding shares used to compute diluted net income per share (in shares)	4,074,338	4,051,754