Note 7 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 28, 2025	Feb. 29, 2024
Numerator for basic and diluted net income (loss) per share:
Net income (loss) from continuing operations	$ (55,757)	$ (424,259)
Net income (loss) from discontinued operations	0	(40,781)
Net loss	$ (55,757)	$ (465,040)
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	5,054,665	5,022,680
Effect of dilutive stock options (in shares)	0	0
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	5,054,665	5,022,680
Net Income (loss) per share - Basic:
Continuing Operations, basic (in dollars per share)	$ (0.01)	$ (0.08)
Discontinued Operations, basic (in dollars per share)	0	(0.01)
Net loss per share (in dollars per share)	(0.01)	(0.09)
Net Income (loss) per share - Diluted:
Continuing Operations, diluted (in dollars per share)	(0.01)	(0.08)
Discontinued Operations, diluted (in dollars per share)	0	(0.01)
Net loss per share (in dollars per share)	$ (0.01)	$ (0.09)