Note 4 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Numerator for basic and diluted (loss) earnings per common share:
Net (loss) income from continuing operations	$ (253,642)	$ 133,549
Net (loss) income from discontinued operations	3,613	(52,587)
Net (loss) income	$ (250,029)	$ 80,962
Denominator:
For basic (loss) earnings per share - weighted average common shares outstanding (in shares)	4,126,012	4,074,338
Effect of dilutive stock options (in shares)
For diluted (loss) earnings per share - weighted average common shares outstanding (in shares)	4,126,012	4,074,338
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.06)	$ 0.03
Discontinued Operations (in dollars per share)	0	(0.01)
Net Income (Loss) per share (in dollars per share)	(0.06)	0.02
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.06)	0.03
Discontinued Operations (in dollars per share)	0	(0.01)
Net Income (Loss) per share (in dollars per share)	$ (0.06)	$ 0.02