Note 7 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 29, 2024	Feb. 28, 2023
Numerator for basic and diluted net income (loss) per share:
Net income (loss) from continuing operations	$ (424,259)	$ 350,295
Net loss from discontinued operations	(40,781)	(8,085)
Net income (loss)	$ (465,040)	$ 342,210
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	5,022,680	4,976,955
Effect of dilutive stock options (in shares)	0	0
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	5,022,680	4,976,955
Net Income (loss) per share - Basic:
Continuing Operations, basic (in dollars per share)	$ (0.08)	$ 0.07
Discontinued Operations, basic (in dollars per share)	(0.01)	(0)
Net income (loss) per share, basic (in dollars per share)	(0.09)	0.07
Net Income (loss) per share - Diluted:
Continuing Operations, diluted (in dollars per share)	(0.08)	0.07
Discontinued Operations, diluted (in dollars per share)	(0.01)	(0)
Net income (loss) per share, diluted (in dollars per share)	$ (0.09)	$ 0.07