Note 4 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Numerator for basic and diluted (loss) earnings per common share:
Net (loss) income from continuing operations	$ (527,398)	$ (253,642)
Net (loss) income from discontinued operations	(39,054)	3,613
Net (loss) income	$ (566,452)	$ (250,029)
Denominator:
For basic (loss) earnings per share - weighted average common shares outstanding (in shares)	4,170,818	4,126,012
Effect of dilutive stock options (in shares)
For diluted (loss) earnings per share - weighted average common shares outstanding (in shares)	4,170,818	4,126,012
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.13)	$ (0.06)
Discontinued Operations (in dollars per share)	(0.01)	0
Net Income (Loss) per share (in dollars per share)	(0.14)	(0.06)
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.13)	(0.06)
Discontinued Operations (in dollars per share)	(0.01)	0
Net Income (Loss) per share (in dollars per share)	$ (0.14)	$ (0.06)