Note 1 - Summary of Significant Accounting Policies - Basic and Diluted Earnings Per Common Share (Details) - USD ($)	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Numerator for basic and diluted net income (loss) per share:
Net income (loss)	$ 212,631	$ (2,103,486)
Denominator:
For basic net income (loss) per share - weighted average common shares outstanding (in shares)	4,515,229	4,393,887
Effect of dilutive stock options (in shares)	0	0
For diluted net income (loss) per share - weighted average common shares outstanding (in shares)	4,515,229	4,393,887
Net Income (Loss) per share - Basic:
Net Income (Loss) per share (in dollars per share)	$ 0.05	$ (0.48)
Net Income (Loss) per share - Diluted:
Net Income (Loss) per share (in dollars per share)	$ 0.05	$ (0.48)