Note 4 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Numerator for basic and diluted (loss) earnings per common share:
Net (loss) income from continuing operations	$ (653,979)	$ (508,907)	$ (1,181,377)	$ (762,547)
Net (loss) income from discontinued operations	(11,799)	(18,653)	(50,853)	(15,041)
Net (loss) income	$ (665,778)	$ (527,560)	$ (1,232,230)	$ (777,588)
Denominator:
For basic (loss) earnings per share - weighted average common shares outstanding (in shares)	4,213,893	4,158,969	4,192,592	4,142,672
Effect of dilutive stock options (in shares)
For diluted (loss) earnings per share - weighted average common shares outstanding (in shares)	4,213,893	4,158,969	4,192,592	4,142,672
Earnings (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.16)	$ (0.12)	$ (0.28)	$ (0.18)
Discontinued Operations (in dollars per share)			(0.01)
Net Income (Loss) per share (in dollars per share)	(0.16)	(0.12)	(0.29)	(0.18)
Earnings (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.16)	(0.12)	(0.28)	(0.18)
Discontinued Operations (in dollars per share)			(0.01)
Net Income (Loss) per share (in dollars per share)	$ (0.16)	$ (0.12)	$ (0.29)	$ (0.18)