Consolidated Statements of Operations - USD ($)	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Net sales	$ 27,935,791	$ 36,169,811
Cost of goods sold	20,952,109	27,445,242
Gross profit	6,983,682	8,724,569
Expenses:
Engineering	500,820	482,057
Selling	2,149,659	2,372,299
General and administrative	4,736,866	4,205,375
Total expenses	7,387,345	7,059,731
Income (loss) from operations	(403,663)	1,664,838
Other income (expense):
Interest expense	(329,455)	(351,899)
Other	(131,944)	(10,434)
Total other income (expense)	(461,399)	(362,333)
Income (loss) before income taxes	(865,062)	1,302,505
Current tax expense (benefit)	(307,220)	367,258
Net income (loss)	$ (557,842)	$ 935,247
Net income per share:
Basic net income (loss) per share (in dollars per share)	$ (0.14)	$ 0.23
Diluted net income (loss) per share (in dollars per share)	$ (0.14)	$ 0.23
Weighted average outstanding shares used to compute basic net income (loss) per share (in shares)	4,058,382	4,047,796
Weighted average outstanding shares used to compute diluted net income (loss) per share (in shares)	4,058,382	4,052,703