Note 5 - Net Income (Loss) Per Share of Common Stock - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Numerator for basic and diluted net income (loss) per share:
Net income (loss)	$ (406,489)	$ (315,238)
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	4,569,720	4,475,279
Effect of dilutive stock options (in shares)	0	0
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	4,569,720	4,475,279
Net Income (Loss) per share - Basic:
Net Income (Loss) per share (in dollars per share)	$ (0.09)	$ (0.07)
Net Income (Loss) per share - Diluted:
Net Income (Loss) per share (in dollars per share)	$ (0.09)	$ (0.07)