Note 5 - 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, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Numerator for basic and diluted net income (loss) per share:
Net (loss) from continuing operations	$ (356,042)	$ (653,979)	$ (961,974)	$ (1,181,377)
Net (loss) from discontinued operations		(11,799)		(50,853)
Net income (loss)	$ (356,042)	$ (665,778)	$ (961,974)	$ (1,232,230)
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	4,299,289	4,213,893	4,272,532	4,192,592
Effect of dilutive stock options (in shares)
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	4,299,289	4,213,893	4,272,532	4,192,592
Net Income (Loss) per share - Basic:
Continuing Operations (in dollars per share)	$ (0.08)	$ (0.16)	$ (0.23)	$ (0.28)
Discontinued Operations (in dollars per share)				(0.01)
Net Income (Loss) per share (in dollars per share)	(0.08)	(0.16)	(0.23)	(0.29)
Net Income (Loss) per share - Diluted:
Continuing Operations (in dollars per share)	(0.08)	(0.16)	(0.23)	(0.28)
Discontinued Operations (in dollars per share)				(0.01)
Net Income (Loss) per share (in dollars per share)	$ (0.08)	$ (0.16)	$ (0.23)	$ (0.29)